Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d10b48e654627a…

MALICIOUS

PDF

62.0 KB Created: 2020-12-24 21:29:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4f082b324808ee53e31149222b8266a7 SHA-1: 19cfdbdd125669099e4b0744f0b3eb98d4ced104 SHA-256: 86d10b48e654627a8e7d9e15d68a2f5693107cf030f9bc7f113d57912f402882
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 0.9996

Heuristics 5

  • 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 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://traffnew.ru/strik?utm_term=goal+zero+flip+30+manual PDF link annotation
    • https://cdn.sqhk.co/lelogusobade/LSLihhf/lekebaxonuvadinim.pdfIn PDF document text
    • https://xakediripikevul.weebly.com/uploads/1/3/4/3/134338645/jezuxoweguzisofu.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/297c0.pdfIn PDF document text
    • https://vigofamuzozovi.weebly.com/uploads/1/3/4/6/134671609/dca9c2.pdfIn PDF document text
    • https://setibadumizokeg.weebly.com/uploads/1/3/4/8/134880372/9214a08e.pdfIn PDF document text
    • https://tugigoboz.weebly.com/uploads/1/3/4/4/134499705/tiveremuxigef.pdfIn PDF document text
    • https://minibimegoviw.weebly.com/uploads/1/3/4/3/134333268/telos.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/luxaduzimase/information_constraints_on_auto-_encoding_variational_bayes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe17a8c2-a45e-4b98-afc6-e3f561c0a6f3/terrible_shotgun_fallout_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0bb8b58-86de-4587-9be5-eb7206f60606/fatuxos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c36673f-86a1-4795-bc3a-6c24d00daa67/lizoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2fe2762-503c-4676-a865-7bdd99873de8/derofanevigoxumid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83338f36-5109-4ddf-9197-ec99e0492082/ok_google_hotmail.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef6dff82-480b-495f-a7fe-88cba8117b44/activity_3.2.2_the_genetic_code_answer_key.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_off0000b2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2F2 5256 bytes
SHA-256: bbaf2b6d7a5256a0c156daf3a93ea4758f2201c6e7ba1b4e0d0cbf1ebbe5e4d3
font_01_sfnt_off0000c4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CA 11444 bytes
SHA-256: d8e751452c7b7c0bf2b357cf029139d0851bffa2fc7ea2b0536aa94e0d6e91b3

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