Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e2c5ed5e3853b3…

MALICIOUS

PDF

95.7 KB Created: 2021-09-16 21:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8576f312f19d1e62444c888695b7dec5 SHA-1: 20cce5d962ed283d2a64d1fd298da3fb6c959bb7 SHA-256: f7e2c5ed5e3853b3da95ca1fe2661e3cb5e09ddcec81c3473eeb5def2e399fe2
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous embedded URLs pointing to potentially compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using link farms on disposable hosting, often associated with SEO poisoning or phishing lures. The presence of a 'utm_term' parameter in one of the URLs suggests an attempt to track redirection, further supporting a malicious intent to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3626

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://pixomot.ru/uplcv?utm_term=kengan+ashura+season+3+streaming PDF link annotation
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/161329ee7cf371---zezevezajiwusananelumulun.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/lebege.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/68326652919.pdfIn PDF document text
    • https://durgabas.coop.np/ckfinder/userfiles/files/94958907211.pdfIn PDF document text
    • https://www.meditech.cz/ckfinder/userfiles/files/luzufakovu.pdfIn PDF document text
    • http://whatdwellswithin.com/file/36850195363.pdfIn PDF document text
    • http://www.77ice.com/upload/files/tumivozenibifa.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/66318690820.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/f24b4409a302a9a52b2a40b857e508b4/33690897811.pdfIn PDF document text
    • http://dichvubaove.online/upload/files/tufufaxinezonugekanus.pdfIn PDF document text
    • https://nawaasha.org/userfiles/file/koliva.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/pijamarifunurikafuvo.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614311e258242---pisabokoben.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xapubejozu.pdfIn PDF document text
    • http://eva.am/files/c9561972d3b4f34f.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/80228421452.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/dodawusibokuzoxifopuwaku.pdfIn PDF document text
    • http://trongtinpc.com/luutru/files/rumubuvinew.pdfIn PDF document text
    • https://ascii.tn/web/cgi/file/digid.pdfIn PDF document text
    • http://unitec-egypt.net/userfiles/file/veriwepanamokigokopali.pdfIn PDF document text
    • http://lnv-cnc.com/userfiles/file/38797990991.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/zexixofarovukasenora.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE82 10772 bytes
SHA-256: f939b8ff24a21ab2a80862539b444f23491f6cb712532a7a06952f122c105a1a
font_01_sfnt_off00011737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11737 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F49 20232 bytes
SHA-256: a2015e66fce8cb9d20f4c2d1b0adfabe023a009ddae315ca66cda5bd0b528b9a
font_03_sfnt_off000163fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163FD 18356 bytes
SHA-256: 4535233fa172bc6cc75f37ee15e9827880d009a7a2942ec2835fb7f5bccd28be

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