Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2435005bc81981…

MALICIOUS

PDF

72.7 KB Created: 2020-12-27 18:53:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: fad39beeb074ec9c7a0f12552ec5d333 SHA-1: 69a99827577eaa7b486167a18fc59c3a97380bd8 SHA-256: eb2435005bc819815c7e2ea8da24005d9c9bf4cc05dc1ebd8887a0f039c4332d
156 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 0.9997

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 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.
  • 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://trafffe.ru/123?utm_term=danby+designer+dishwasher+manual PDF link annotation
    • https://vuzavadakugodo.weebly.com/uploads/1/3/4/8/134857872/feganasam.pdfIn PDF document text
    • https://cdn.sqhk.co/sepunaro/gjijNie/surodonaxupabawodukib.pdfIn PDF document text
    • https://cdn.sqhk.co/monazaxumol/9jfW6QR/manor_cafe_hack_mod_apk_download.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/defewal-gakivifi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369776/normal_5f8ab5a559c53.pdfIn PDF document text
    • https://cdn.sqhk.co/jawubibegeba/ihKf7ha/city_defense_tower_defense_strategy_games_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414161/normal_5fd9049e45fb5.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/goThbjd/pixelmon_mod_mcpe_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383132/normal_5fa9c29b4d0cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389384/normal_5fd2ffffc7cbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393349/normal_5f9d1be10e255.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/wulotugadag/34411029926.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/capital_humano_libro.pdfIn PDF document text
    • https://s3.amazonaws.com/zojizu/pokemon_tower_defense_poke_tower_2.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/bodies_by_rachel_6_week_challenge.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_off0000ddc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC8 5572 bytes
SHA-256: 8340d50a1e2615c0881345fc139ce73d929899787fcabe3d765d4c7e83e80afb
font_01_sfnt_off0000f0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A6 11120 bytes
SHA-256: 94e8271b08d59f81ca400748a9a32d5b6ab436ac277eb4d72c872cac53dfcc74

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