Malicious PDF — malware analysis report

Static analysis result for SHA-256 550067211aaaab15…

MALICIOUS

PDF

40.0 KB Created: 2021-09-29 00:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: d005f897363712733322426c0c4d33c7 SHA-1: b1f13b769de033dc0efb44516d1fafbaca0197ba SHA-256: 550067211aaaab15a9291ae920a21f3a40926f81e2fc297b1865e4b37d7812ab
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as a phishing lure due to its image-only nature and the presence of numerous external links, many pointing to compromised CMS uploads. The structure suggests it's designed to trick users into clicking a link, likely leading to a malicious site or further malware download. No scripts were extracted, but the PDF's nature strongly indicates a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8966

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 40 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://study4student.com/cache/fck_files/file/gipisekevezafet.pdf In PDF document text
    • http://zulassung4you.de/bilder/file/nofolanijesurujomanemefim.pdfIn PDF document text
    • http://hasomedia.com/userfiles/file/32458463788.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/3e68c9d9627b26d7c507c6a4d8016459/magarukopojuxevenojukok.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/imgc5mimfbk45tmgba7hsesqt1/takiromivekowupuju.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614404fa430f6---79922448908.pdfIn PDF document text
    • https://primer-spb.ru/files/files/46992505761.pdfIn PDF document text
    • http://lingvastar.z-i-g-z-a-g.com/userfiles/files/katejagofevonozusulux.pdfIn PDF document text
    • https://cytokin.ca/upload/editor/file/93684768028.pdfIn PDF document text
    • http://ternovykh.ru/content/file/pirokarisosenegu.pdfIn PDF document text
    • http://nature-revive.org/files/file/10396719662.pdfIn PDF document text
    • http://sun-apartments.pl/data/pages/senuz.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/4d980bcd72a9f5397e6b7401368376e9/siwavevuj.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/12260160721.pdfIn PDF document text
    • https://schachverein-marchhoefe.ch/fcsr/news/upload/file/godusipoligumikoxed.pdfIn PDF document text
    • http://mega-stainlesssteel.com/uploads/image/files/lixikaferedikinowona.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/91985589763.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/27157108910.pdfIn PDF document text
    • https://adetexfoamgroup.centralcms.cloud/galeria/files/56477661663.pdfIn PDF document text
    • https://emartdeko.pl/galeria/file/94456289307.pdfIn PDF document text
    • https://slotpt2.com/contents/files/loputexepikariwula.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=top+camera+apkPDF link annotation

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