Malicious PDF — malware analysis report

Static analysis result for SHA-256 678cbe5f8e822a12…

MALICIOUS

PDF

63.7 KB Created: 2021-09-08 04:24:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 70ae28855da9068bd51cfcd5519f54dc SHA-1: 58575fc976c50104f85bccb83078ef6a10db5d3c SHA-256: 678cbe5f8e822a12659e329b10438ed8b3e4ba3c0f51eebb0a209e75b351fc16
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier further support its malicious nature. The presence of embedded URLs indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5435

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=2016+honda+odyssey+ex-l+manual PDF link annotation
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/1472faa19cb27bd1b6579a4e684ed3df/60078134759.pdfIn PDF document text
    • https://bi-kiesabbau.de/cmsimple/images/file/sazapapuj.pdfIn PDF document text
    • http://studiomedicoveterinariobellucci.eu/userfiles/files/sobimopexitiragetor.pdfIn PDF document text
    • http://ahs1978hounds.com/clients/0/09/09313dc2b2b2138818c22350edca9cf7/File/757387350.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa8c42a968---68828264972.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/667fd70c8272b085b8d20b89792731c0/fonikerutigi.pdfIn PDF document text
    • http://investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/makoresalizojo.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5928b0fb5---25007301162.pdfIn PDF document text
    • http://alcantara.cz/data/file/93075926080.pdfIn PDF document text
    • http://kxzyjy.com/CKEdit/upload/files/rafusax.pdfIn PDF document text
    • http://lednotice.com/userData/board/file/67170267539.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b77dce2f26d---kijejuzelidaxi.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/nowevexifole.pdfIn PDF document text
    • http://group-anons.ru/userfiles/files/41487686666.pdfIn PDF document text
    • http://cassotech.nl/site/data/ws/files/larogel.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/juwujabosidowisote.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/dj8o9q0nhd7cvclicgie6p8pk5/56657438535.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/kiluromiteweluremoz.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/48949476067.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/wezigo.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b81a916ca1---41550228335.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160aae025e186c---ditolegenixomidakojonimuw.pdfIn PDF document text
    • http://okwmd.com/upload/fckeditor/file/90316407741.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/rekomatopo.pdfIn PDF document text

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