Malicious PDF — malware analysis report

Static analysis result for SHA-256 9de2d0966561f45a…

MALICIOUS

PDF

96.0 KB Created: 2021-07-17 15:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 91a2b650a2e30a2c4ac6a94a0b3f2b72 SHA-1: e88dee9878f6164fdac9b213db6a1d2bb86e298d SHA-256: 9de2d0966561f45aa9a02869f07a0096e9b4009c80dd19f7fa2abcaa6b03e340
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains a link farm pointing to compromised WordPress upload storage, suggesting a phishing or malware distribution attempt. The 'SE_CLICKFIX' heuristic indicates social engineering tactics designed to trick users into executing commands, likely to bypass security measures and download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078c4423464f---salos.pdf In PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/e9d16077f078a4ef10f6445332ecf2ec/doxijasasivasedeteja.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/17344824392.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eebe9377af---vilafi.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/1911e6e5728b478a9ffc058cbce53724/71029810203.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/c0a7e1014889d11c71ad0c710cf357c5/82651679113.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/7f1b731a4dbd1291e4beb598a67ec185/nexavobevinupojisupeb.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/0373ba82ba06b8ccd5310f0216701e22/rodarujufidotozuwapediba.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e131316bd24---45348635725.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/53264821129.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160afc44f6a1b1---gaxulolivovuwefumetagi.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210518010615136.pdfIn PDF document text
    • http://michelbarbot.com/upload/files/virigubiribu.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/12196953904.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/tc8aaoe1ujvrbhjvfughk10goa/gewugobujulavog.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/bcd894d09aaba6ad9546829ee7cba863/14130657231.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/gabiputataxamimoxogozi.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b35b017b4---15675940209.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee5f5151684---74996149012.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8cb8d28dbd---vanosekipavonabozaba.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/61071785485.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/6a6ba0e07f0985833462ddca9d44fbf9/gusowapagep.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/xetur.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608995c5c31fb---8479246867.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/52252157024.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ac8daead9---10730492602.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/72295753967.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/92efb380f74039948f15e1968c7aaebf/83907899214.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=best+stretched+resolution+fortnitePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011d0a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11D0A 21308 bytes
SHA-256: 4fa06276e9c7c595add6dafe23bd22d6b4748d920aa91f8e0c9e44d6dd170dec
font_00_sfnt_off0000ecf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF1 10564 bytes
SHA-256: 0d396b57d2c682e5287d4e7a3128f459d178f7b54e3a180e58eb8fb4915eaec0
font_01_sfnt_off000104f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001421a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1421A 17404 bytes
SHA-256: 5eb6cf8ee1d6107e3934ee4ae52d5950a5a0cce7eb6bc71499c08d9a91f7fac6

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