Malicious PDF — malware analysis report

Static analysis result for SHA-256 488b35d6778bf976…

MALICIOUS

PDF

74.7 KB Created: 2021-09-23 07:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e0b5029a16e61c920ee1752c63f1ce70 SHA-1: 881373014d25a1460805b0c093a1726e1eaaa0a2 SHA-256: 488b35d6778bf97672af582e368a505d936d33f4a3364f777df89af83f670df9
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the document is structured as a link farm, likely to obscure malicious destinations. While no scripts were directly extracted, the presence of numerous embedded URLs and the overall structure suggest an attempt to redirect users to potentially harmful content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6968

Heuristics 4

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613807cece857---8132180675.pdf In PDF document text
    • http://hangquangauto.com/files/tatiku.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/59714557174.pdfIn PDF document text
    • https://refakatci.net/userfiles/file/wojudebejuzalofi.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/69955040522.pdfIn PDF document text
    • https://beltamas.by/content/Files/52745256663.pdfIn PDF document text
    • http://kustari.net/userfiles/file/bifutu.pdfIn PDF document text
    • http://jowinbio.com/upload/files/202109060712134649.pdfIn PDF document text
    • http://megatex-plast.ru/pub/file/86903486313.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/56565352379.pdfIn PDF document text
    • http://oletrans.sk/editor_uploads/files/nopikezugodiwavegitok.pdfIn PDF document text
    • http://www.heatandgas.com/EditorImages/file/75429534805.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/mojoxa.pdfIn PDF document text
    • http://cuanhuadanang.vn/uploads/image/files/megaregevezediwaxubofir.pdfIn PDF document text
    • http://sintjorisparochie.nl/userfiles/file/xivumami.pdfIn PDF document text
    • http://gitishahjahanpur.org/ckfinder/userfiles/files/fikukisitimumaxebovis.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/9071675187.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/fewusatojizididomo.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/f2eca30e1833c0cbde03f0436dfa2e6a/91878709592.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/16612036343.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/vizipuxenozotisazevimi.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/94410579126.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=handmaid%27s+tale+season+4+episode+7+watch+onlinePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF4 10920 bytes
SHA-256: ffa812ccd35244e9e143c6527527551e560083b256a8f851382288fd31f7c8d2

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