Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d374b67099f801c…

MALICIOUS

PDF

88.6 KB Created: 2021-01-11 22:45:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6c15004cfd3bc452be55e51c1925155b SHA-1: dd533aacf54a62f3000ca2e052c72f93f33ea8ac SHA-256: 3d374b67099f801c3d77f33c8bcb8f96d7bca711e7dbf085d4bb97ec4dc9e034
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://trafficel.ru/aws?utm_term=guild+wars+2+fractals+beginner+guide PDF link annotation
    • https://kewoloxonesafuf.weebly.com/uploads/1/3/1/6/131606745/cf9033b7e7554b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410983/normal_5fdbdee44f927.pdfIn PDF document text
    • https://site-1176085.mozfiles.com/files/1176085/ea_sports_bike_racing_game_free_download.pdfIn PDF document text
    • https://pimizotola.weebly.com/uploads/1/3/4/7/134770615/zudazobu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382974/normal_5fcf4c2b08889.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nefomojuwet/fawesinoz.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/vonorezitiwewubesasori.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/bring_me_back_to_life_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/bdo_karanda_boss_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/69813321176.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/tipemuwozotutewobu.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/72334912936.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/60728820185.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001109d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109D 5356 bytes
SHA-256: 2eff39677dcf6bc8cd40b3247a324056c7316ead4275d626d4afa6e55760f2ca
font_01_sfnt_off000122f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F8 10844 bytes
SHA-256: b49126ce83c4617d839fbf47ac96e121ff15f82d762c33edb073f58dc86b2098
font_02_sfnt_off000147c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147C2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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