Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c8a23d41b4aa22…

MALICIOUS

PDF

54.0 KB Created: 2021-09-02 02:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c511534e4ee3d5f6e7b9716748397545 SHA-1: 828bcc66edec67ab187c5941a5a0c8e79f6efa6a SHA-256: 74c8a23d41b4aa2257684c71704a9a50400b5aa476f42b1ace79ecdaec9a4263
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous URLs hosted on compromised WordPress sites and disposable domains, indicating an attempt to redirect users to malicious content. The presence of these links suggests the primary goal is to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9104

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kamkmori.cz/ckfinder/userfiles/files/waxoxunuvelulij.pdf In PDF document text
    • http://booklandbooks.com/userfiles/file/rewuxagebetetepa.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16124bdedd40bd---38192536290.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/1c658199bf0ac64cfaea0afecb6ad9dc/jeketeja.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aeb81e0188---94826396797.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/10e36eaeaf19744c8010fb7391005d00/35998268238.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/7367751842.pdfIn PDF document text
    • https://sealand-pptc.com/userfiles/file/27315546023.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/83prn9hm19eavn7ilesppl20j0/nanizoxekiduxuke.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/9c6751cbd9e6f9d6213e4cbcfabf91d0/54778482771.pdfIn PDF document text
    • http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/terin.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/pjhrspu5s3gu6m5fqbdfiv1a1q/fisaberaziguresiburuf.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1607774a6b5ec6---wofoderu.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/jijemukuxeboliju.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ab839d293bc---31342531451.pdfIn PDF document text
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/a8f5ab569c53cf7a67ef1b059a5efbdc/61859674877.pdfIn PDF document text
    • http://dayou.tw/uploadpic/files/202108140350511523.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086788c1ee97---4759094491.pdfIn PDF document text
    • https://verticala.ro/images/userfiles/61698113312.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/2f59aa8dc5d5f6a4d061ba58573f610a/geludak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=wh+robinson+elementaryPDF link annotation

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