Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6623d1da0f4578…

MALICIOUS

PDF

70.5 KB Created: 2021-04-02 00:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f01c831436f101042eae4ae681557885 SHA-1: b7a1ffd2e34197620e3aa17ee2a46e28428cfe1d SHA-256: fe6623d1da0f457806c0f182004c5936c8ae0e1d14b5467202f9e5f8d2574f9c
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://leonvi.ru/123?utm_term=rational+numbers+worksheet+for+grade+9 PDF link annotation
    • https://dufadijikog.weebly.com/uploads/1/3/5/3/135325035/zaxugipejuxe_fedijedarufoda_wudifej.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/qjdhgid/98596534671.pdfIn PDF document text
    • http://shopsmmv.site/jungle_adventure_game_download_javagtema.pdfIn PDF document text
    • http://7lessons.space/62899175557b4qsl.pdfIn PDF document text
    • https://cdn.sqhk.co/nepajenine/NFfgfih/42555720041.pdfIn PDF document text
    • http://gravkamen.ru/34386323068p9n5d.pdfIn PDF document text
    • https://masizomomom.weebly.com/uploads/1/3/2/6/132681315/0fe666961ec6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421969/normal_6024b675e345f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388833/normal_5fcaf6153aad8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499622/normal_5fcd347450b81.pdfIn PDF document text
    • https://luresigixake.weebly.com/uploads/1/3/5/2/135294948/2047703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493920/normal_60531c96256a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zujazeku.epizy.com/alice_merton_songs.pdfIn PDF document text
    • https://d23eb412-52e1-45ef-a32a-0c032022daee.filesusr.com/ugd/03485a_182c2841f0c34994b2d526ed227c790f.pdf?index=trueIn PDF document text
    • http://figofubinodafe.rf.gd/77695443251.pdfIn PDF document text
    • http://gewekerob.epizy.com/free_translation_definition.pdfIn PDF document text
    • https://89511c73-251b-4bee-a1a5-5f4bd4863124.filesusr.com/ugd/f24cb8_9cf3cc426a114e7c8c97ada4bb7d20be.pdf?index=trueIn 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_off0000d1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E2 5780 bytes
SHA-256: 138c119fef433c5cef83593bfc2784c737e2e33d7535991bb8827d0aff936e0d
font_01_sfnt_off0000e57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57B 11032 bytes
SHA-256: c3345252361d2090fc334b7eeebb3d210d7d638daf1bcc060633cb04fdbbb10a

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