Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff7ef01c649ac88e…

MALICIOUS

PDF

40.7 KB Created: 2021-08-20 01:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 499edebb97481e054b457bf28d9e8b55 SHA-1: d0325900460e2fee6d7f4bfa3c0cd7d18384c18d SHA-256: ff7ef01c649ac88e95aa82b30d351c7912d195016bf6e12ee8c65b8a79dd0e70
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 0.8955

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 https://infrive.ru/uplcv?utm_term=the+official+sat+study+guide+2019+edition+pdf+free+download PDF link annotation
    • https://hosrem.org.vn/ckfinder/userfiles/files/7902447647.pdfIn PDF document text
    • https://estoniapools.com/contents//files/33647387748.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16114160690a2a---retugesakixotu.pdfIn PDF document text
    • https://curryleafharleysvillepa.com/hang/userfiles/files/90878486277.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2f8a3a764---witewefisufajapoxe.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/fagobuxajigij.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/wiwisebipinuginariwewapi.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/65946170075.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/19020816416.pdfIn PDF document text
    • http://www.toptehnik.si/images/72852706513.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/meweni.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/31934690971.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d632c479ec---tiwasibijevafapafevosut.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/bv4h5rebqdc3jjg23okr7rhjut/29821344283.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/brtu2qv198gcag3hrcemrj5es2/fiwinopuvuvifabamobinip.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/3f4396ff17271f32f0c62bf17511f922/nanef.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/75610126924.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/e5a1929ad810da3c488a739b8d8ddbf0/fedamizokefenemo.pdfIn PDF document text
    • http://velocimapper.com//webfiles/file/39721722331.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d074517a3e---gipidenuzakegarur.pdfIn PDF document text
    • https://eurocomm-italia.com/file/47313493269.pdfIn PDF document text
    • http://rhondachem.com/d/files/suzetazegabezifapub.pdfIn PDF document text

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