Malicious PDF — malware analysis report

Static analysis result for SHA-256 68715a7d854fa0dc…

MALICIOUS

PDF

38.9 KB Created: 2021-06-19 10:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9e116edce55c4ea0df94892fef8dbe2d SHA-1: 5c3bf42aa34fc8eb37f049c0c9f33cf59b584b10 SHA-256: 68715a7d854fa0dc999a76df6619dd928c492aa535874d01a75156a8249261f0
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 0.7452

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 38 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 https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/ebd90fe139dab57efb042453bcbb702a/2449420489.pdf In PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/5c082a3210d15d805c3dfe5611c9bad0/99250653132.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/vixito.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbd6e92306---77889536049.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/kogawexowu.pdfIn PDF document text
    • https://service-panev.com/userfiles/dokajomibibifir.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/gubulapum.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/7840764ee5c31d9632dcb2ee36293112/wupigokedovinaluzevur.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c0864ba98c9---xedep.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/91790710080.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/tijuzavidifusel.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/86h881qoslhb2n3me7k5ej2ri5/86179747986.pdfIn PDF document text
    • https://wita.lt/images/files/gitewababew.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/45208912780.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/uivth4fgc005sbkpbae8cun3db/pomuxejorofa.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=mona+lisas+and+mad+hatters+pianoPDF link annotation

Related samples 8

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