Malicious PDF — malware analysis report

Static analysis result for SHA-256 94df1f9da9173c58…

MALICIOUS

PDF

73.7 KB Created: 2021-02-17 15:51:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fd698a17e01a95bb1627d27daf054980 SHA-1: 965be74d3dae7a655231bbcee3137b6918451138 SHA-256: 94df1f9da9173c5874691345c875059b626e628d87806c6d79370eccf2f256a7
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-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://bologen.ru/aws?utm_term=marzano+walkthrough+form PDF link annotation
    • https://cdn.sqhk.co/savunowudob/chfjdjj/71546529639.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368996/normal_5fe3d7dee163f.pdfIn PDF document text
    • https://bajipupetezin.weebly.com/uploads/1/3/5/3/135315063/kinivod_xezimodix_sefivezot_mesurexewowezul.pdfIn PDF document text
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/pozuzurorebuki.pdfIn PDF document text
    • http://butilegoz.22web.org/46327606964.pdfIn PDF document text
    • http://nesejanemik.22web.org/kunurukubofom.pdfIn PDF document text
    • https://cdn.sqhk.co/savaketiju/hLifFEW/40565534176.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482858/normal_5ffea72482cee.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelewexo/cqjjidj/25542382958.pdfIn PDF document text
    • https://kelebewo.weebly.com/uploads/1/3/4/3/134359650/6247887.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lizolubemerawi.epizy.com/geometrical_isomerism_definition.pdfIn PDF document text
    • http://puxetedategekex.epizy.com/93865356167.pdfIn PDF document text
    • http://zikofizoredu.rf.gd/blender_2._79_nature_environment_creation_free.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_off0000e5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B2 5216 bytes
SHA-256: f8675ca4ca8f99a695cd3f1e1e40eaf98a8f704715bb3b408072ab4c9f1149cb
font_01_sfnt_off0000f76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76B 10080 bytes
SHA-256: 2a06416117d32095b35f2488da0a149a505034dcd79b632500bc9c0c5a7ea961

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