Malicious PDF — malware analysis report

Static analysis result for SHA-256 f76b574665fe42a0…

MALICIOUS

PDF

68.1 KB Created: 2021-07-16 15:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bc8d2cac6f30214b384c76f51ba9e266 SHA-1: 1b4849b24c39af64c981151ef89a4f91dc0b184c SHA-256: f76b574665fe42a0f5100684c8cef4c5685b6ea5290b35c23c762c10095a6311
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and a large number of external URIs, many pointing to compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the exploitation of vulnerabilities or redirects the user to malicious sites, contributing to a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6678

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://synerhu.ru/uplcv?utm_term=deciduous+forest+fauna
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/970c66c1d49686519c53878954488ea3/235195739.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/7e23f0c1503dcb85d0460e0a5e2b679e/46387211138.pdf
    • http://dsm-trhs68.com/clients/8/81/818e764d3414495a915a5f66638dc9bf/File/32063001570.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/doq70jkqpao1q130k313khssn5/korovuribuxuxetik.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/80u25or3qs014sj8rru3fdag71/dobotolete.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/4rj17ihbdqrtnmbu2ernl303bi/66001978521.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5ba9d94fa---20085709535.pdf
    • http://businessvaluationapp.com//fck_files/file/16074612543.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33c4722e7c---20176504557.pdf
    • https://sokolzgierz.pl/web/uploads/files/satamedatevo.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160899f2235ecc---wokewajotixa.pdf
    • http://tipiland.net/upload/file/gegerilikalakod.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d40d1870d8a230387826c10374d82cc0/96156182643.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b35a6a30da5---timixakixirezisikiguporub.pdf
    • http://anandtouristcorporation.com/uploads/68316907922.pdf
    • http://rustproofingottawa.com/userfiles/file/kolewomupi.pdf
    • http://carshopm.com/js/upload/files/nudit.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35182a3b3a---93992748587.pdf
    • http://jirehenl.com/userfiles/file/030619241834.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea18df0124---rezerezexudafatugozivofuj.pdf
    • https://fenixfalt.com/userfiles/file/fusamalowumefidulu.pdf
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/e3bb6064a0a954c7bb5ca03f0164e0dd/29305414375.pdf

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