Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2571e54730282b4…

MALICIOUS

PDF

70.0 KB Created: 2021-02-23 17:09:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0234809c34fed950efd6a4ae6ffeb63d SHA-1: 893ef5c126378bbcc11c0acbdafea1ac6125da77 SHA-256: d2571e54730282b46d20bc18b761b82d981bdaf54bc9b4793037a995dddc33ec
186 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics as a link farm, containing a significant number of external URLs pointing to potentially malicious content. ClamAV also detected it as a phishing trojan. The presence of numerous links suggests an attempt to lure users to external sites, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://leonvi.ru/wb?keyword=veg%20dishes%20list%20indian PDF link annotation
    • https://cdn.sqhk.co/lojosexotak/jaierL4/tesuwurojivivumifaber.pdfIn PDF document text
    • https://cdn.sqhk.co/luzeginu/BCgdVge/pijonawirefuroxuta.pdfIn PDF document text
    • https://cdn.sqhk.co/nipigagavadu/gehcgcP/mavalatalugijinuxanonilas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404959/normal_5ffd205c1704c.pdfIn PDF document text
    • https://cdn.sqhk.co/samofetob/hhAgdid/povelegepujonujugawuzo.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/hehhijJ/business_development_manager_salary_car_dealership.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/94jdiuu/zajidopaj.pdfIn PDF document text
    • https://xuwudivalef.weebly.com/uploads/1/3/4/8/134889087/fugodujilimit.pdfIn PDF document text
    • https://cdn.sqhk.co/vujixete/Yb7iFjD/fizz_runes_lol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489028/normal_6023ce83a3d92.pdfIn PDF document text
    • https://zonebudufekepok.weebly.com/uploads/1/3/4/3/134382159/lobagaduw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384469/normal_60065a997f028.pdfIn PDF document text
    • https://womerakuketuzal.weebly.com/uploads/1/3/1/8/131856195/zovip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449399/normal_601b610182770.pdfIn PDF document text
    • https://gegaminowudajun.weebly.com/uploads/1/3/4/0/134041134/c5ba0d02a4f6f94.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dunupilopun.epizy.com/6135987247.pdfIn PDF document text
    • http://xewegifugeralot.rf.gd/chhukar_mere_man_ko_song_pagalworld.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_off0000d52a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52A 4956 bytes
SHA-256: ba9a5536265f5b84b8d8611c7a1152eed60b5e072ad738ad7de0abeea50a3ecb
font_01_sfnt_off0000e60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60C 10416 bytes
SHA-256: 9133b441e7707620e2b538065edb6b3de1c0520c12f22319789c719bd7fd1ae0

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