Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee0ec22c0a5d9a2…

MALICIOUS

PDF

75.3 KB Created: 2021-02-12 12:40:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3ef854d3ac04395bcdf127df97cec915 SHA-1: 092146f142ca3c86a3a9720f54c54f19ab997c10 SHA-256: fee0ec22c0a5d9a28326d43943779ee686e79b0a23aa6f6b91db011a563fdc61
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/123?utm_term=classic+rogue+poison+guide PDF link annotation
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/zoxebisud.pdfIn PDF document text
    • https://zudezujom.weebly.com/uploads/1/3/1/3/131384555/2164317.pdfIn PDF document text
    • https://silepokow.weebly.com/uploads/1/3/4/3/134366863/berevugegiduwenul.pdfIn PDF document text
    • https://gapudozesaneg.weebly.com/uploads/1/3/4/5/134525911/5d67ae7.pdfIn PDF document text
    • https://bapumora.weebly.com/uploads/1/3/2/7/132740837/gekedijulex.pdfIn PDF document text
    • http://cetakchantek.com/113432756928urcz.pdfIn PDF document text
    • https://cdn.sqhk.co/mudinaxape/gRjeYja/scrabble_helper_unscramble_scrabble_words.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376612/normal_5fe090ffaad5d.pdfIn PDF document text
    • https://kisezuxuromo.weebly.com/uploads/1/3/0/7/130776201/sokisis.pdfIn PDF document text
    • http://fitness-ital.fun/28820784517zca7.pdfIn PDF document text
    • https://radogatibemif.weebly.com/uploads/1/3/2/8/132815767/24c6a04996582ad.pdfIn PDF document text
    • https://cdn.sqhk.co/kopenanum/C6gfFgf/ludirilakewubifarenutas.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/5026678.pdfIn PDF document text
    • https://bazatodeniwumov.weebly.com/uploads/1/3/0/7/130739274/2762369f28841c.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/evony_the_kings_return_guide2mmru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471512/normal_5ffe0012cd0e1.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/gimufesajo/hungry_shark_evolution_money_cheat.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/botiwufazuvifegokaboluvar.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/90316751153.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_off0000e9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CE 5144 bytes
SHA-256: 39a0f6a48090d8be6b4f1f8648070dc31602bb9c89a906cbd3f8e06e972a7431
font_01_sfnt_off0000fb52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB52 10784 bytes
SHA-256: 1a71f30dbb28523b0662f0ea4845284f670cc08d81487bd8f03309d7684dfd4b

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