Malicious PDF — malware analysis report

Static analysis result for SHA-256 270e0bdb3bec42d4…

MALICIOUS

PDF

40.7 KB Created: 2021-06-23 16:09:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ffe49faeff5e921b78e21a09630d5ac7 SHA-1: 54e01f102cd8f31e121841a7e87b533775c81fef SHA-256: 270e0bdb3bec42d4faf5f00f1fe67586e5550f93bc6b2c106a686c3e401d1f5e
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 0.8166

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://smidgel.ru/uplcv?utm_term=special+relativity+for+beginners+pdf PDF link annotation
    • http://poorclarescork.ie/images/41925873594.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/khj528dlvp043q61p4gqlhdd82/ziludog.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b1f72cc8d---mabejoruzuribov.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/8046416baa80c16b0603f0ec055afbd3/14319484130.pdfIn PDF document text
    • http://mfahk.com/upload/files/neguxefewezeweboririzifi.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/46507468051.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/somuwoxip.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/legixut.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1621538062749341452.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/75928278038.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff8174657b---46667258963.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a98a6448753---xifijiv.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f875ab9c6---22123576036.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/9570024afc111f22a9eb31db216faf0a/vufozabuxin.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f345d8c7a2---30018173691.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/39951984889.pdfIn PDF document text
    • http://canvangdientu.com/images/file/besokekigeravexu.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/i2aj39j97vpmqr0famsvg9mki1/45737786221.pdfIn PDF document text

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