Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2eada927bf1e99d…

MALICIOUS

PDF

71.5 KB Created: 2021-02-20 09:49:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fb805a5b1a803c210c8c601d95a368da SHA-1: 155631ab91c9a5cfa1e161323bb87f2190088c39 SHA-256: c2eada927bf1e99d15bdfcf341ad8771297c94b765cf5271de63c3c82efba340
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 0.9998

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://maypoin.ru/strik?utm_term=how+much+is+a+yamaha+r6+bike PDF link annotation
    • https://namonivet.weebly.com/uploads/1/3/4/4/134493383/gaxixegujal.pdfIn PDF document text
    • https://bukodebavuv.weebly.com/uploads/1/3/4/6/134657655/9380998.pdfIn PDF document text
    • http://fartook.online/how_much_oil_does_an_international_dt466_takedy64t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473047/normal_5fd7ba1dc2cce.pdfIn PDF document text
    • https://kezozebajex.weebly.com/uploads/1/3/4/2/134265808/potezez_takuxif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421360/normal_60282ef485d23.pdfIn PDF document text
    • https://xalifabosivibu.weebly.com/uploads/1/3/0/7/130775217/kamofotutupar.pdfIn PDF document text
    • https://cdn.sqhk.co/simikitivo/hgdgghc/warrior_cats_books_online_free_the_new_prophecy.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/43Vgf4r/prince_temple_run_gameplay.pdfIn PDF document text
    • http://hot-money.fun/gemuzikuwinobaradogfqdqc.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/xirixepo/timothy_zahn_thrawn_trilogy_order.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/99768757640.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/templateurl_in_angularjs_component.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/92990071918.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/52634050378.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/whatsapp_plus_version_6._87.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/7094884921.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/84740022357.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_off0000d9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A4 5520 bytes
SHA-256: 5f8e80b0be2369cdc43d377dd6dd3dfe92dc35ecfb5240d45eb0170c6c6f36ed
font_01_sfnt_off0000ec52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC52 10820 bytes
SHA-256: 792b2a5d02d06885834c1ac1bb02601a4c055af04122deed1d2ed7c95fadf7ec

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