Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d28aed0990dac1…

MALICIOUS

PDF

89.7 KB Created: 2021-04-02 20:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a3f79ef468f0f00e619241d51a065f3 SHA-1: 75fc3045fdd9e76ba186509cf638df52b36ec0d4 SHA-256: 59d28aed0990dac15441703972d668d8d7a07b34540137eb2b14034e35e060e8
196 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, indicative of a link farm. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to facilitate an advance-fee fraud. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://kuzutuzo.ru/wix?keyword=toshiba+fire+tv+user+manual
    • https://static.s123-cdn-static.com/uploads/4459170/normal_5ff8278d04a14.pdf
    • https://static.s123-cdn-static.com/uploads/4413585/normal_5fc8113ff04ed.pdf
    • https://cdn-cms.f-static.net/uploads/4388406/normal_602dd0244aea4.pdf
    • https://static.s123-cdn-static.com/uploads/4426953/normal_5fcb378d4c82c.pdf
    • https://cdn-cms.f-static.net/uploads/4375890/normal_5fdc8a7eb10b3.pdf
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/56692e94a71.pdf
    • https://cdn-cms.f-static.net/uploads/4374373/normal_603fc3858c4ea.pdf
    • https://static.s123-cdn-static.com/uploads/4468531/normal_5fed4fa48c263.pdf
    • https://cdn.sqhk.co/ruzelapivoku/fEggia6/ernst_and_young_asc_842_guide.pdf
    • https://cdn-cms.f-static.net/uploads/4388181/normal_6011539d29f2c.pdf
    • https://sosuxivi.weebly.com/uploads/1/3/6/0/136056733/5c83de1e0a0.pdf
    • https://fojozotewimoko.weebly.com/uploads/1/3/5/3/135324817/welevafux.pdf
    • https://cdn-cms.f-static.net/uploads/4365624/normal_600a46f28e984.pdf
    • https://static.s123-cdn-static.com/uploads/4366623/normal_5fe2b10836177.pdf
    • https://cdn.sqhk.co/dodamewope/bjiPvjO/48039894450.pdf
    • https://wininivawad.weebly.com/uploads/1/3/1/4/131483201/880669d.pdf
    • https://cdn-cms.f-static.net/uploads/4498997/normal_6037a9dabdcad.pdf
    • https://pevamuwewewi.weebly.com/uploads/1/3/4/6/134636281/gegaj_difezijatibem_maxanipofogebu_sovupuzowesiwij.pdf
    • https://ragulifogikub.weebly.com/uploads/1/3/3/9/133986704/9321243.pdf
    • https://cdn-cms.f-static.net/uploads/4427811/normal_605bf9e7a6b71.pdf
    • https://ravemazezaj.weebly.com/uploads/1/3/4/8/134885195/sekuzinabuseper.pdf
    • https://zovarufegurer.weebly.com/uploads/1/3/4/6/134625168/d5963e024.pdf
    • https://cdn-cms.f-static.net/uploads/4447878/normal_60145a35c2a0b.pdf
    • https://cdn.sqhk.co/kosifodalab/JSieGjf/31596025298.pdf
    • https://static.s123-cdn-static.com/uploads/4416504/normal_5ff58c15d48c4.pdf
    • https://cdn-cms.f-static.net/uploads/4389801/normal_60591d9827457.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012108.bin
d7878ddce002bd10af764eeaea48c1b6a3e431e87f161889abfb17867e32f5cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12108 5156 bytes
font_01_sfnt_off0001326e.bin
9321e8b7009f89e6306eec4b03085d448b6a09bb01122f0f0e6007438d04128f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1326E 11500 bytes

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