Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec844531313db4d…

MALICIOUS

PDF

60.9 KB Created: 2021-07-22 09:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6bbbb5d8bda53135afea19d6541b4e50 SHA-1: d085c9938502ae90ac4cf77aff5ed3614b0b78b8 SHA-256: 3ec844531313db4d8ad34a69dab718a30298a77d8021e08c2a3cb0a95d00ae1d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF acts as a link farm, directing users to compromised CMS upload storage and disposable hosting. This suggests the document is designed to trick users into visiting malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8982

Heuristics 5

  • 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 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://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e520415017---xivuxizojuzim.pdf In PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/dinidujixudavowuzaluketab.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/kbltl5e2l9gudumt64f96cg26v/pulepiwix.pdfIn PDF document text
    • http://korea-seals.com/ckfinder/userfiles/files/powodepavari.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/s60n9g541qdjh0gfckf82cs1q6/majasulax.pdfIn PDF document text
    • https://fallsplat.se/file/43411697784.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/57215318175.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d48138e9a51---62176224238.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/m690c2tiamauvoquf94fupou18/32160492333.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/53698441341.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/d802273c0655bbbc342dc1fac8b8f0bd/53877786140.pdfIn PDF document text
    • http://gyogytornasziget.hu/uploads/files/18001807559.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/fibunolemitotaxugonomuri.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e757fb0821d---xuvekegulotemus.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ee4db5f14---pojixex.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/72701886006.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/lunogorarupogiro.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9a5231c2a---talilar.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/fivilawidegavej.pdfIn PDF document text
    • http://daedukgs.com/admin/fckeditor/data/file/20210622191142.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/jidokugalewo.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/odlfo4072k1u769hgu9k54ejkb/zoruvobufof.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/8570444583.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/26387148632.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=some+and+few+differencePDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb66c6b1a75---lobawitinejapuj.pdfIn PDF document text

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