Malicious PDF — malware analysis report

Static analysis result for SHA-256 2925523db7ca40ef…

MALICIOUS

PDF

80.3 KB Created: 2021-09-18 00:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b2a2875565dd206e6a290a8fb5ca070f SHA-1: 0953e4c65cec4a8e8a4c443651257f6c40716ebe SHA-256: 2925523db7ca40efe3d300ef7d74ac91a93d74c89017c11994284938399ca6f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm with numerous URLs, many pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://oniceh.ru/uplcv?utm_term=how+to+connect+android+phone+to+laptop+with+usb+cable PDF link annotation
    • http://www.chubsorn.com/file/files/48238320333.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/1c76fq7hkumoimkf9og47vrluj/17838928360.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/71504865919.pdfIn PDF document text
    • https://xtremefitksa.com/ckfinder/userfiles/files/28667025115.pdfIn PDF document text
    • http://asztalosweb.hu/userfiles/file/mitatevamukugivazuku.pdfIn PDF document text
    • http://neodermclinic.com/file_media/file_image/file/balumatun.pdfIn PDF document text
    • http://saringkarnwood.com/UserFiles/file/3753959643.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/161308d1109871---1655819968.pdfIn PDF document text
    • https://umiyawoodworks.com/fckdb/userfiles/file/35492922506.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/44753989979.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/kafovanepobir.pdfIn PDF document text
    • https://infosantiere.ro/userfiles/file/82232978873.pdfIn PDF document text
    • http://mindennapi.hu/upload/file/tuxedum.pdfIn PDF document text
    • http://jagdrevier.hu/upload/images/file/sofedutofawabereriwalifi.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/midar.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/143c72d10395abc5db994591fb1673fb/kivov.pdfIn PDF document text
    • http://lpxs168.com/filespath/files/20210913000121.pdfIn PDF document text
    • https://www.wemservice.com/ckfinder/userfiles/files/44390832967.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/bdb97785aa15017b1a21c8281e0ef196/deduzowe.pdfIn PDF document text
    • https://ratodua.com/contents/files/35266766514.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/delejija.pdfIn PDF document text
    • http://rainternacional.com/userfiles/file/varevobapajuwexekef.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/refabupupuvomemajopobovub.pdfIn PDF document text
    • https://tktravelkorea.com/FileData/ckfinder/files/20210905_281BC57D3BAC0951.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0A 10928 bytes
SHA-256: 2d4925d6451173bc16c4c3b78ba779a2ba1726913f8c669cb767bf75d450a3de
font_02_sfnt_off0001060e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060E 17436 bytes
SHA-256: dcc32aa209a6eff05b88e3f92e1cebd50d6ecfc0bf5b0c0062f918be9d483593

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