Malicious PDF — malware analysis report

Static analysis result for SHA-256 659e72b1be2bde25…

MALICIOUS

PDF

93.0 KB Created: 2020-12-27 08:05:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 90441fc0f003c853f89e96067b82fc46 SHA-1: 856e6280694fde2627b1a1199278c2ec89c30343 SHA-256: 659e72b1be2bde25d2f97fd8a48ac22b5178841e4d15eb7258077446acfa0d20
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains a large number of external links, many pointing to other PDFs hosted on various domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://traffset.ru/aws?utm_term=fiscal+sustainability+report+2009', is likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/aws?utm_term=fiscal+sustainability+report+2009 PDF link annotation
    • https://cdn.sqhk.co/balekunu/Rqphfgi/into_the_box_physics_puzzle_game_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369764/normal_5f87e2ff7376c.pdfIn PDF document text
    • https://cdn.sqhk.co/nazopekujavi/ahebfih/hashtags_best_tags_for_instagram_photography.pdfIn PDF document text
    • https://cdn.sqhk.co/semegopo/bKqjfF7/five_hoops_basketball_game.pdfIn PDF document text
    • https://cdn.sqhk.co/totuzilexif/Fhgfhb1/30076207511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408712/normal_5f9393f6519d9.pdfIn PDF document text
    • https://wadonado.weebly.com/uploads/1/3/4/6/134677460/7655ed987d536c8.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/Ahaggic/gartner_hype_cycle_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501774/normal_5fda1c2dc92b5.pdfIn PDF document text
    • https://zepixufiguw.weebly.com/uploads/1/3/4/1/134108583/7282306.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495525/normal_5fd8311738201.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392463/normal_5f906e6a9b848.pdfIn PDF document text
    • https://bukodebavuv.weebly.com/uploads/1/3/4/6/134657655/6278629.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/neviwove/94704684099.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012a64.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12A64 25556 bytes
SHA-256: 4015d83bbf9e402e42d726ee9dc909aaab5ef7ae04625198fef3bebabaa7fda0
font_00_sfnt_off0000f156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF156 5436 bytes
SHA-256: b3159395b69d070ec03e59803713767a0a616e0ecfc6f5c97fb77925ea61831e
font_01_sfnt_off000103d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D0 11244 bytes
SHA-256: b8a4cfada498eb70f3a61cd30531f5aaf1ba8551eb2d75443e6b7e549395a7ba
font_03_sfnt_off0001587f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1587F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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