Malicious PDF — malware analysis report

Static analysis result for SHA-256 887cc9d49d956b89…

MALICIOUS

PDF

68.7 KB Created: 2020-12-19 06:18:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e5d99c703a0f201674a3025475a20ade SHA-1: 9c549a383618dfcbf1d679b65354d7f2dce6a867 SHA-256: 887cc9d49d956b89b5f39532b4c973042c373b1fab0de87e78e48d34f2c57659
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://trafficel.ru/strik?utm_term=how+tall+was+elvis+presley+in+feet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475571/normal_5fdb98bbe042b.pdfIn PDF document text
    • https://xezujexowesujol.weebly.com/uploads/1/3/4/5/134502134/b7e5534.pdfIn PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/7f540f9.pdfIn PDF document text
    • https://dakikizubebara.weebly.com/uploads/1/3/4/8/134889455/59c477b1fbe5e.pdfIn PDF document text
    • https://niladomawinur.weebly.com/uploads/1/3/4/8/134875702/jogexebekaxexa-momimudiwekami.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5fa6615635bb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388165/normal_5fd0b8a473825.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481164/normal_5fc98e263f6b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473926/normal_5fc8a256a64b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401518/normal_5fbb8d78a2570.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365582/normal_5fc5bdad0a8dc.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/369804.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387590/normal_5fbe298ab6bc9.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/zibenoroduzuw/netatetowimuvojumijemezer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cbc9632-aa95-42c6-8de9-bfdfc2f6cf86/sonoselek.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_off0000d1b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B7 5108 bytes
SHA-256: f89e7b653754e65d42e6310ffcb2991835b018cfb0d36f52c8e12f9c3cde9923
font_01_sfnt_off0000e347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE347 10076 bytes
SHA-256: 3a0eeeb75983d02dee99c72e2b85583bfe35cf208d3af09813237a0dfef80851

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