Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab99ea25c3a78ed…

MALICIOUS

PDF

78.9 KB Created: 2021-04-05 11:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a305d84eccef3bbdcd0c146d2312986a SHA-1: cdeedd87866ae0d9bf3cb052355dab67f289357f SHA-256: fab99ea25c3a78ed502f6eca1b39c1a7f73268a2b67e2ee443005668bff54557
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://druttle.ru/123?utm_term=cookie+sheet+organizer+container+store PDF link annotation
    • https://zovalimifo.weebly.com/uploads/1/3/4/7/134728177/zuxukuwutanukutupefe.pdfIn PDF document text
    • https://rapokivagifo.weebly.com/uploads/1/3/4/3/134338569/sofoxofuzosaxevafuv.pdfIn PDF document text
    • https://supuzuvafexag.weebly.com/uploads/1/3/5/3/135383103/8ff2159cf.pdfIn PDF document text
    • https://cdn.sqhk.co/duvetezoje/eEKhbhf/la_redoute_clothing_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/fuludasowipu/hshjUdi/golden_dot_connect_legit.pdfIn PDF document text
    • https://cdn.sqhk.co/gixixutiji/Y5oLhgY/1294599585.pdfIn PDF document text
    • https://rijomedoniki.weebly.com/uploads/1/3/5/3/135399424/xejopi_gekogomexiro_nixedadekurajil_gamukawone.pdfIn PDF document text
    • https://ginabedo.weebly.com/uploads/1/3/4/0/134017532/ralojanexus.pdfIn PDF document text
    • https://kazodorog.weebly.com/uploads/1/3/4/9/134904699/kazuxupetu.pdfIn PDF document text
    • https://cdn.sqhk.co/gesaxamadew/jage1l0/zarchiver_download_for_pc.pdfIn PDF document text
    • https://janogawe.weebly.com/uploads/1/3/0/7/130776821/rekumav-wipura-zojaxiwuw-liviwewemiti.pdfIn PDF document text
    • https://cdn.sqhk.co/lazimafuxuxi/8PgjiNm/paint_by_numbers_kits_for_kids.pdfIn PDF document text
    • https://tadesurirow.weebly.com/uploads/1/3/2/7/132711952/3275cf16561.pdfIn PDF document text
    • https://cdn.sqhk.co/lexikegije/oI0ijne/24467253172.pdfIn PDF document text
    • https://cdn.sqhk.co/jabupexipa/Vdfic9L/zilogosijubonop.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/tosevud/piresezevifarekudifi.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/33572008070.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/kaxikojoxabapotamobipe.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/aikido_technique_de_base.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_off0000f610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF610 5048 bytes
SHA-256: aefbd384d95a6fea11ae77447b55118598e023fd1abfe688a1bc510d5699f0cc
font_01_sfnt_off0001073f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073F 11176 bytes
SHA-256: 122c10d828f2990379bfabbbd58794c8fcb1120cd9a2805155fd6796cac9f1bd

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