Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae2bb965cb227b8…

MALICIOUS

PDF

77.2 KB Created: 2021-09-06 18:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dfd13a75c4b4fe945494c2749660d766 SHA-1: 26a63ecd118c6e23453deab7b8dfb02af30d8ede SHA-256: 9ae2bb965cb227b8622b9089d2a1e39b9f6536c10dad59b14855fb81ab7895de
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the execution of JavaScript to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=mr+boston+bartender+guide+pdf PDF link annotation
    • https://traffictkt.com/viking1/uploads/files/vodavixejugekodo.pdfIn PDF document text
    • https://bda.ch/ckfinder/userfiles/files/getijifuwekevubavesene.pdfIn PDF document text
    • https://jerseyshorepirates.com/userfiles/files/7089650615.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/7694e452ef84cfc4c5db39db30f5ca98/37515134191.pdfIn PDF document text
    • https://actor-conseil.com/files/file/borimazelodorudol.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/239247d0fc9e6b2d6985c8bb29f39797/89002649919.pdfIn PDF document text
    • http://hotspot-usa.com/js/upload/files/23458875156.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740ea3ae058---damufafuxe.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/ngdu1b0kjqpg7moenn6jnuinm0/gafijof.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6b09e5708---22560255201.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/58734699162.pdfIn PDF document text
    • http://campcolefamilyreunion.com/clients/82065/File/tufuwiwavuj.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/75631340594.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/42535652234.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/oqbs6jhuucpvldta32q8nait46/39482058245.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/gukifejezefu.pdfIn PDF document text
    • http://fygl.net/uploads/file/100844014631.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/46cab50ebb2ad703a7c26d75b00e1246/suzokas.pdfIn PDF document text
    • https://stopserv.ru/files/file/62904747718.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/53527357746.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/jofopefafaxudunilamer.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ee37b0b0e---rebene.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/e89b6a057c4aebcd81f98e15eee7c534/sekuvedofelemusununa.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/rofuratiliviw.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/9e09e704847637db9b9e9aec8bffcaa6/25078318850.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/lotabegitopilusizof.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C1 10860 bytes
SHA-256: 03b727f90c271441f3145699284c6679086a961b780deef96b6e9caa6416faae
font_01_sfnt_off0000de91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A3 18396 bytes
SHA-256: 243b8acbadefd02e877ab9dec0a8f78a1c3b3f161ee20a4138a3c7da8a6632c0

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