Malicious PDF — malware analysis report

Static analysis result for SHA-256 272e6b019d6598d2…

MALICIOUS

PDF

84.5 KB Created: 2021-03-03 12:27:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a6f1089c0bf0ec52fc5bf35515a64a71 SHA-1: 48de658194d19ac57fe4786b7c84118f1ab6b707 SHA-256: 272e6b019d6598d2700b88e72c6ed1fe0caa86d1cfcfc10fa3fe7b53b87503d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to lead users to compromised or malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/strik?utm_term=ice+cream+maker+ball+walmart PDF link annotation
    • https://cdn.sqhk.co/mojikeke/lygjijR/bike_unchained_2_unlimited_money_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vixokezafafu/hihijiH/64737738287.pdfIn PDF document text
    • https://belinadojo.weebly.com/uploads/1/3/1/6/131607131/2f21129eea50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452152/normal_5fcf80a45e9e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496404/normal_6019889c8fe95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427080/normal_6011046eb886c.pdfIn PDF document text
    • https://cdn.sqhk.co/navozaxezini/R1jbagd/67661337523.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416506/normal_5fdb51d046961.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368493/normal_6001e533d2b4c.pdfIn PDF document text
    • https://kobafanosige.weebly.com/uploads/1/3/4/0/134016660/wujogamitad.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/UEhdaq4/traffic_empire_tycoon_apk_oyun_indir_club.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376374/normal_6028890ef05a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451363/normal_5fdad4b78ef72.pdfIn PDF document text
    • https://cdn.sqhk.co/lepapina/jch1gjk/49336683509.pdfIn PDF document text
    • https://mujunuduxur.weebly.com/uploads/1/3/5/3/135327440/85e86da1de5b9a.pdfIn PDF document text
    • https://cdn.sqhk.co/nadizolobe/WNhfjsj/backgammon_mobile_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473049/normal_5ff3aca7e90c8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fajixe/mufesevova.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/td_ameritrade_thinkorswim.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/vivenunopi.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE6 5000 bytes
SHA-256: c338a12d792a0334395923beae19484db06abe063d99801778906aa405967b0b
font_01_sfnt_off00011fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE6 10728 bytes
SHA-256: 19895c3d745efbd614685ea467ff5f4076f18202211cabeb3eed6a4d1d8fb9b2

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