Malicious PDF — malware analysis report

Static analysis result for SHA-256 a35bb461532cd00a…

MALICIOUS

PDF

73.8 KB Created: 2021-01-28 13:12:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bfa9368cbfbb84c87e21714badc03510 SHA-1: d29561496dfa7595300288d04da4017f0d1c77c1 SHA-256: a35bb461532cd00a7d673b56ac736331481f2ebb78912cafee2fbd89661c952d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/aws?utm_term=in+gold+we+trust+report+2019 PDF link annotation
    • http://iglivesupportteam.com/sage_the_gemini_and_jordin_sparks_marriedseyaj.pdfIn PDF document text
    • https://cdn.sqhk.co/datawafag/eifihSH/juicy_fruit_snack_shorts.pdfIn PDF document text
    • https://federadedeladol.weebly.com/uploads/1/3/4/6/134626130/15c0f6fc1422c00.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/zombie_combat_actionb3myf.pdfIn PDF document text
    • https://cdn.sqhk.co/mifimafonuku/5ic5ijM/big_sean_bounce_back_vanic_remix_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/bobimugura/jhHhaih/90467687787.pdfIn PDF document text
    • https://cdn.sqhk.co/bazexolareja/dx4hjpl/julef.pdfIn PDF document text
    • http://psylath.com/goat_simulator_goatz_apk4ot8h.pdfIn PDF document text
    • https://gimituwemowi.weebly.com/uploads/1/3/4/8/134872285/964572.pdfIn PDF document text
    • https://pulezigo.weebly.com/uploads/1/3/4/6/134600697/510507.pdfIn PDF document text
    • http://gladkoe-telo.xyz/cheats_pokemon_glazed_my_boy_android75qbp.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/zofufalekaxuvunolidu.pdfIn PDF document text
    • https://wilowukodol.weebly.com/uploads/1/3/4/8/134881933/5696081.pdfIn PDF document text
    • https://kodopexo.weebly.com/uploads/1/3/4/6/134693050/jixudi.pdfIn PDF document text
    • https://deluwibenarut.weebly.com/uploads/1/3/1/3/131382693/labidavuvidufe.pdfIn PDF document text
    • https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/rokijaza-buparokapexog-gesowitizopu-nodalurisajeboz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE249 5428 bytes
SHA-256: c30459162819f1b15211a94eaf2991281e68eadb971bad15b6d173f007fe8149
font_01_sfnt_off0000f4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EC 10960 bytes
SHA-256: fd62075259fc9ed9152efdb666d571fab6689befd68c36ad6fd47a1b805a9f4e