Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f5f445cee28408e…

MALICIOUS

PDF

68.4 KB Created: 2020-11-27 07:11:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 46217c3a9c8b45f170c574b391179c86 SHA-1: 3bbea5b5e89870099e7dc714705a7a6625f30c66 SHA-256: 3f5f445cee28408e7d40aa3d40a29e6188d277c5324e85312d9a0bd0d7c9560a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 6

  • 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 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://traffking.ru/strik?utm_term=alien+streams+firestick PDF link annotation
    • https://sazagirisama.weebly.com/uploads/1/3/4/5/134585928/warokalobiresu_wisutojamibub.pdfIn PDF document text
    • https://sefariduzaki.weebly.com/uploads/1/3/4/6/134665623/xeferukize-pevadigati-zelipejid.pdfIn PDF document text
    • https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/9875662.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388614/normal_5f9d4403731eb.pdfIn PDF document text
    • https://pujuferot.weebly.com/uploads/1/3/4/6/134657525/waweloxik-mipixexeno-rexabogosewifal.pdfIn PDF document text
    • https://dewubolisevibe.weebly.com/uploads/1/3/4/3/134318954/jotije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415327/normal_5f97dcb9e35ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470821/normal_5fb8445c9daa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487663/normal_5fbf2fd390080.pdfIn PDF document text
    • https://gadigode.weebly.com/uploads/1/3/2/6/132680949/nabuwurexine_buxolisanu_xewomu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387826/normal_5fa0a7b3e9879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386591/normal_5fa458496b75f.pdfIn PDF document text
    • https://wudumimimi.weebly.com/uploads/1/3/4/3/134356267/4652283.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/tejuvonixag/soulknife_pathfinder_class_guide.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_off0000cd3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3A 5080 bytes
SHA-256: 79929274d040e587ace174c8ce56ad1a9b99c45aeecb86b95e8c21f351401ec5
font_01_sfnt_off0000de71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE71 11552 bytes
SHA-256: 8dd3afe3aa71af6321f809991af6593c223183e0a30967d562ee6fc4af5bfaa2

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