Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f1153b163a57ff6…

MALICIOUS

PDF

59.6 KB Created: 2021-09-02 21:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7609fc20a061d3c638b6f2ecd97e1ca7 SHA-1: b375139fdd64c1b439c1db3172650e6f0cf7785d SHA-256: 3f1153b163a57ff6519de24721b824eea76e6d686e598a07a2e5bffd4d26cc73
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to various websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8763

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://medvor.ru/uplcv?utm_term=blending+words+worksheets+preschool PDF link annotation
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/72346318928.pdfIn PDF document text
    • http://schokobrunnen.com/idata/tewidoburilezapogufiwar.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a16bd176e2---79444382544.pdfIn PDF document text
    • https://fivetc.net/uploads/files/porizabapoxup.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/161308cf47308b---nozijebupekijaf.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/m8k3d9sbh96o5f5357jljl1nv2/45498371970.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/13352520254.pdfIn PDF document text
    • http://hyundaiokla.com/uploads/files/kekoxuw.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///77998898512.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/97838728350.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/wozijinegalununazun.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/34bf66fa5c732c6118d44a6dfd1ca76f/nogatowubozubafo.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/e3af89a1108cbef5361f7d2f49e581be/kupalafo.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1611bfedede769---57357299511.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/jdbc4c37mgd7lpdsnsr7ebldf1/35046534436.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/18526517573.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee8d1154fd---21185269915.pdfIn PDF document text
    • http://ckpak.com/fckeditor/userfiles/file/juwakobopugowamojilisoj.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c325c0744---76517600731.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/m99a69h1qq6g029e4h3p1idon7/xerumapalol.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079615157e1d---21022101572.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160c70d25a5851---bitefad.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/44448716123.pdfIn PDF document text
    • https://ra7a7p-h3ba7.com/contents/files/fevenepibegoxabedex.pdfIn PDF document text

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