Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3be7c0a7bd21e59…

MALICIOUS

PDF

77.2 KB Created: 2021-02-14 16:57:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: fa00419f7efba8ea50008abcfe9c9e6c SHA-1: eedb3061037351b066e7b8a1af3818dc6336672c SHA-256: d3be7c0a7bd21e59f0480230313518a8eab586bdfbd13f4cd49fd6050da0d5c7
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier. It contains a large number of external links, many pointing to other PDF files, suggesting a link farm or content distribution network for malicious payloads. The primary URL, 'https://seumenha.ru/aws?utm_term=twitter+gif+er+bot', is likely the initial lure, directing users to a collection of other PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/aws?utm_term=twitter+gif+er+bot PDF link annotation
    • https://cdn.sqhk.co/zukuxenopo/igWlUjt/35756143023.pdfIn PDF document text
    • https://wodumipanopova.weebly.com/uploads/1/3/4/7/134731655/mibogidok_lafozax_minuwomig_vedunezaru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369645/normal_5fe534ff7876e.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/bhjgeD9/xalagujoviviwe.pdfIn PDF document text
    • https://cdn.sqhk.co/bemapebe/hiihGii/kung_fu_panda_ost_dragon_warrior.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483589/normal_5ffea11288f9a.pdfIn PDF document text
    • https://zolowokixo.weebly.com/uploads/1/3/0/7/130738875/gakajeb.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/ifR3Mua/pro_bowling_on_tv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477386/normal_5fdfa68d34648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487641/normal_6018cdd40d4a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457298/normal_5ffffc0420ace.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422637/normal_5ffab3c04406a.pdfIn PDF document text
    • https://cdn.sqhk.co/bozogekeji/hVHhddr/.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kujesulad/botuwuredeginolevuli.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/bufijifog.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/breakup_punjabi_song_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/nawilenifelabumanujiba.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/tulukepirukubep.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/bitev.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AC 4380 bytes
SHA-256: ec9d545bbb2bef0fa0fbd12ef90e6a5092bdb2b20582a27b9deb65f96d792e6e
font_01_sfnt_off0000f5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B3 10516 bytes
SHA-256: aaf3e5d6cbb6649359cb6b63b13334cc633f7e41ee91c8ef37517c507beb6946
font_02_sfnt_off000119c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C3 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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