Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c29b1637f50643f…

MALICIOUS

PDF

70.6 KB Created: 2021-09-04 06:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9eefe04dad4e5d7c42c7977e58914205 SHA-1: 7f96058d290a319c3bf6be411b15c02f4d63f8b7 SHA-256: 7c29b1637f50643fef4b2d91f097a8fd9495d346ae7f61dfafcd907a1fb2b0d4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm used for SEO poisoning or to redirect users to malicious content. No scripts were extracted, but the presence of multiple compromised upload paths indicates a likely attempt to host or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6715

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://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/bf2hjgq6tlkn4r4rg9bs5unv94/gimeparixofifexim.pdf
    • http://bociany.sk/media/file/wezoxita.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/8t9n01cr7pi5cvqcia5l2lpq60/pevewilelejobam.pdf
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/zupejagodugufemaluxa.pdf
    • http://odessahighschool1970.com/clients/7/70/70263b1be1b93b62200e198143f59f20/File/xodoputafegagozivitewatud.pdf
    • https://fototipia.hu/files/files/1315798632.pdf
    • http://hart-metale.pl/gimnazjum/userfiles/file/33782193442.pdf
    • https://copab.tn/216mag.svn/uploads/files/32051415241.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff7771df79---8248019252.pdf
    • http://yuanjen.com/ckfinder/userfiles/files/9154574364.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b2cdb5d05---xanoporebolepanujanugigi.pdf
    • http://extracam.es/app/webroot/arxius/file/gawegupubaxa.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611cfea8243b9---xeriluva.pdf
    • http://drivingschool-brno.eu/files/12456686389.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160717b2c6988a---gajaruri.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16089698c535e6---lusepafajuken.pdf
    • http://mygiftltd.com/userfiles/file/wiwefanasijexer.pdf
    • https://travelinnsuites.com/nbloom/fckuploads/file/resanureguritoxu.pdf
    • http://szwygs.com/upload/tanamidivaw.pdf
    • http://jarosi.hu/files/file/49274472170.pdf
    • http://www.dilipprabhavalkar.com/images/file/zugojilifisegozawutat.pdf
    • https://mvmdigital.gr/files/files/75405997911.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/f6cd454ab477a1f824d8092d055d1416/tolobok.pdf
    • https://rtvpuls.com/ckfinder/userfiles/files/maruzugewi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=transport+worksheet+year+2
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e518.bin
149d7eb63399c65eb332c00d05a8c4b81f06161f6d03b05a21dd7601e8f159c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE518 17452 bytes

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