Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ffe38ffa1a8ba7…

MALICIOUS

PDF

41.5 KB Created: 2021-07-20 06:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 346b5fb3adf875b0e953a856cea0ee67 SHA-1: f6ae6f8ea353f4ccb3cd05c89a3b8039b067b373 SHA-256: c3ffe38ffa1a8ba7e084b58f2e62eff14d77850b0bb4dfb2d68f5f7aa1250fb9
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7348

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://chronicles.ae/userfiles/files/dojisivubafefew.pdf In PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/d1c62534a7618de7175adaa126ea4436/25341334127.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/tasumuximawisuzuzexe.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/276pvn2ihe6lk92bg4rn1h3n0k/15841737233.pdfIn PDF document text
    • http://samrayburnclassof1980reunion.com/clients/873185/File/rebenuruguzojetodubu.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/vitorasa.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/5d9c4d9e56ac358883612584deacc62a/55195784984.pdfIn PDF document text
    • http://www.heksan.com.pl/file/60011620699.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ba19971bb6e---welokeresetifufito.pdfIn PDF document text
    • http://vhshf.de/File/33974690124.pdfIn PDF document text
    • http://piau-po21inn.com/CKEdit/upload/files/61647230327.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/fnjmhesafu8c3b214ku30ms390/xidetulurojodogi.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/34619268077.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/todekowivokirufevekazu.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/2d651a5222a8f283129ea5c57a6f7bc7/31137178048.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817072eed84---xokezedezo.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/64709206280.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/24053426775.pdfIn PDF document text
    • http://cokhitienvuong.com/uploads/files/sufumibuwowoxufizudun.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608506675aeac---zewuwiwadijosexuz.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/ub4ibp6620g8849u2ohgbbv01n/sivelekeka.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/0dc32d53cf65c6b6d3ea238e432953ec/tevajerikowi.pdfIn PDF document text
    • http://coffee33.ru/archive/file/vilaxigolubofuvi.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/wewojaga.pdfIn PDF document text
    • http://sequoia59.com/clients/867919/File/paxasekis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=all+right+angles+are+equalPDF link annotation

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