Malicious PDF — malware analysis report

Static analysis result for SHA-256 176a3c1526a566c7…

MALICIOUS

PDF

63.9 KB Created: 2020-12-27 23:21:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cf0c3a93a8856204dfd33291ceecd8b8 SHA-1: 9ea55f532e7e4b554ae28ce889ff53ff0c9e4af0 SHA-256: 176a3c1526a566c7c0621705a80124a63f6e393906a0408fef0d1596d8483b0a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, contains a search query related to children's clothing, which is likely a lure to direct users to malicious or spam websites.

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://trafftec.ru/123?utm_term=minnie+mouse+clothes+for+toddler+girl PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5f94373fdada5.pdfIn PDF document text
    • https://jamudavepavu.weebly.com/uploads/1/3/5/3/135324372/nisolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382958/normal_5f8c042f03e91.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/c0de4f5cd.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/ponorusigutaxatod.pdfIn PDF document text
    • https://vabebixeteguju.weebly.com/uploads/1/3/4/2/134234611/3934485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_5f9c585fa2fa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422638/normal_5faf27d81b5f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5fe8812b872e3.pdfIn PDF document text
    • https://mabosuvix.weebly.com/uploads/1/3/4/8/134851695/bogodovusowiwupunut.pdfIn PDF document text
    • https://xetamoro.weebly.com/uploads/1/3/2/8/132815737/womud-detefiwu-fewejifu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454042/normal_5fccf6fe07103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402712/normal_5fc1d6f189ef9.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/meludav/amasadora_mezcladora_de_carne_manual_inoxidable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12afc73f-7cb4-4363-a0f7-745deb24b9ef/49180136787.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_off0000bd2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD2A 5228 bytes
SHA-256: c583f3f845630803c8545bd15d2a870a8784affac24de1583435c2a844f4b0e0
font_01_sfnt_off0000ced5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED5 9808 bytes
SHA-256: 091503d272daf24218bb0ed0a7e106a36235df45509a54b734597e939bb12e11

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