Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d12b622ca90823…

MALICIOUS

PDF

77.3 KB Created: 2020-12-26 18:39:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: afe692c5fdc1890833c775682eff564a SHA-1: d8d890622ba8794de8ce11f7639bd7b6efe0bc7e SHA-256: 72d12b622ca908239c30838953cc45782df0971e555b6737d02f2776091f1854
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://traffking.ru/strik?utm_term=classic+boy+games+free+download PDF link annotation
    • https://jiduwaramusova.weebly.com/uploads/1/3/4/8/134854614/tazaxadax_tekoxi_befaziwafaj.pdfIn PDF document text
    • https://relotozaku.weebly.com/uploads/1/3/4/2/134266658/198605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f8a756ac0cf5.pdfIn PDF document text
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/5dd955.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5fe62e636adcf.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/4589730.pdfIn PDF document text
    • https://cdn.sqhk.co/guledijuxi/IhcrKgi/amazon_music_vs_spotify_vs_pandora.pdfIn PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/4540249.pdfIn PDF document text
    • https://segedexulitino.weebly.com/uploads/1/3/4/6/134612069/mepaxutux_webanigivedel_lezemovada.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e52ff89c-990c-4cd6-bfa6-5c41c9409f42/90935132590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ed7d0e-4989-4ee3-9f81-f907ca278519/sezomejuti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/663cc952-a4de-4635-8549-1ea15d598669/2018447344.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_off0000ebf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF6 5580 bytes
SHA-256: 093832f9206f9814045c37e548afccf4c03a5f0762b076f30bc6233eac781eb3
font_01_sfnt_off0000feea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEA 12764 bytes
SHA-256: f3a1c78e399a7440692720a02eb7a852223e81131b0c40a6ebaf091cd3feb0bd

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