Malicious PDF — malware analysis report

Static analysis result for SHA-256 159cc5c000312793…

MALICIOUS

PDF

44.4 KB Created: 2021-07-03 00:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2764b0ac003ac7d1e2f455e3184bb9e8 SHA-1: 8d96ce450dd85cc83515a0259cc6a63afab24b3c SHA-256: 159cc5c00031279376f06110476af8713df0235688d6ddb1e80fa6218e9fc73a
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's an image-only lure designed to trick users into clicking external links. The document body is heavily obfuscated and unreadable, but the presence of numerous links to compromised CMS uploads and disposable hosting suggests a phishing or malware distribution attempt. The primary attack vector is likely spearphishing attachment, leading to a malicious link click.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5805

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 44 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://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/b1b3eed02483b14c5bbd8345b2bc8b2b/rozodowutevupefiwomiga.pdf In PDF document text
    • https://careersourceokaloosawalton.com/files/public/figizazutemixis.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ac56a4024---85458251168.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca0cee1ce0---49455524198.pdfIn PDF document text
    • https://vigiweb.cl/dinamicos/files/file/28700763341.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/vt9a54a2313ga1kinj19ete9a6/wovutitisef.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/xanuxazalimibolibo.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c141faa1c3c---6095131052.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/71921011993.pdfIn PDF document text
    • https://actorconseil.com/files/file/32545801979.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/32633480959.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1e6e25f48---79398928398.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/jitinokuxup.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b773bd94be3---6369971436.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/63c7da164551e285772fc80057a04172/dugoj.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/303ac40947a2fe40024e648ba6a34f0d/takipepozebiwam.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/lkq0j9n29334vommcvugumari2/genamumoberunewedabu.pdfIn PDF document text
    • https://nanosoft.mn/images/content/File/lotakusakevaxade.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/e2da4022d7ce6ecd776ef983353d60aa/pizopasuxuwinerufivukinu.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/sdal8pfsv3db59v45d316bvrqj/pibixifawifi.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/0e703ee26e10bf757b260a6be0cf3f57/sevebanedaxolowe.pdfIn PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/bovijovafipesazu.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a78f2e359---garoruvutipazosijadigap.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/99001148679.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/gizumerefonov.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/61923489204.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=samples+of+personificationPDF link annotation