Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2595cf319adab8…

MALICIOUS

PDF

73.1 KB Created: 2021-03-15 16:02:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5492f0b379fe40a993877a14a36be32c SHA-1: 9ddb62e380a26057a75c8cceeba4fc74876db42d SHA-256: 9d2595cf319adab8c06898fcba95dc9e0f1a2ce4b0b566293d18262510dc438f
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 0.9996

Heuristics 6

  • 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 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://jacksth.ru/wix?keyword=google+docs+upload+pdf PDF link annotation
    • https://zajosozuxisofe.weebly.com/uploads/1/3/1/4/131407459/nadagevekapemexivab.pdfIn PDF document text
    • http://characduwe.space/fefirelubafo5z0b2.pdfIn PDF document text
    • https://cdn.sqhk.co/nosuterib/xJwighg/descargar_rally_racer_dirt_2_android.pdfIn PDF document text
    • https://cdn.sqhk.co/pagupuxu/Vjdc6Wj/vafaxu.pdfIn PDF document text
    • https://letezinujafi.weebly.com/uploads/1/3/4/9/134901841/2880724.pdfIn PDF document text
    • https://dubitofux.weebly.com/uploads/1/3/4/4/134458445/3937825.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/Ahjjaja/soguperowumedovapipab.pdfIn PDF document text
    • https://paninopuj.weebly.com/uploads/1/3/0/7/130739529/gudujetase.pdfIn PDF document text
    • https://ravemazezaj.weebly.com/uploads/1/3/4/8/134885195/koduxi_vifij_pelutitakamemo.pdfIn PDF document text
    • https://vabijerokajesi.weebly.com/uploads/1/3/4/5/134595953/pogubudonimo-tevewomev-xumowefadadux-tosezosuwo.pdfIn PDF document text
    • https://tunutepefa.weebly.com/uploads/1/3/1/4/131453603/memujanojozede-jatujejojoniral-pifobimomo.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/the_leadership_challenge_6th_edition_ebookrnhns.pdfIn PDF document text
    • https://cdn.sqhk.co/bevurokakug/gGO6Mge/drag_racing_bike_mod_indonesia_2.pdfIn PDF document text
    • http://gajelifuluxapov.mywebcommunity.org/vilel.pdfIn PDF document text
    • https://zazalefofano.weebly.com/uploads/1/3/4/5/134578352/nebaxodaselefe.pdfIn PDF document text
    • https://xujufefar.weebly.com/uploads/1/3/1/4/131483110/386be1f.pdfIn PDF document text
    • http://nutetuxiv.mygamesonline.org/c_language_programs_examples.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/falejogajir/49371854568.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/gevotimejefejelofagidiwe.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/pufaxajevav.pdfIn PDF document text
    • http://bokawevetejap.atwebpages.com/98653889910.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/annualized_performance_excel.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE200 5260 bytes
SHA-256: b4427932318769df5290d154af103f6cafa68f8810ccea55d74257e6c2e62d86
font_01_sfnt_off0000f404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF404 10424 bytes
SHA-256: b706c0b302816cf4e1b86084ed15bcd880bc7401234cdd3871ffed8a5987abef

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