Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c5df432fb7be7a…

MALICIOUS

PDF

95.6 KB Created: 2021-09-05 00:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 94f271c019946bcca0c3898b63bdfdd8 SHA-1: c7c4a9d54808f6af1d96e6f7e9cc638b40d1ae2f SHA-256: 80c5df432fb7be7af73e8b6b1e35889962530e51909ff53de3a0f564ef05b110
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many hosted on compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9268

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
  • 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://crewmak.ru/uplcv?utm_term=wrecking+ball+jeff+kinney+pdf
    • http://ocean-ex.com/images/blog/file/22181647805.pdf
    • http://daegyung.kr/userfiles/file/20210831043236.pdf
    • https://terlickodds.cz/www/www/fckphotos/file/49909806596.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16126ebbded1cd---78530276856.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b4904638eb3---veziguki.pdf
    • https://tomclarkvoiceovers.com/userfiles/files/dawuguxijubunufulobo.pdf
    • https://sieuthimaytinhcu.vn/upload/files/95063015318.pdf
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/d048cbe20fd8b75991d93f62d62ed400/pagijowafokavaxilekofus.pdf
    • http://ecohort.com/userfiles/files/taxanawibaxinalupegiw.pdf
    • http://dztechfin.com/upload/file///dunekoxa.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3232b1b549---99938655218.pdf
    • http://epoch-making.jp/js/upload/files/95240974655.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/a9e37okql7h1glhr57fg6p1iq9/76389209232.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff44245468---vamasazavupibinonizemufo.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/5e932ec8896f246db53a45205f7ac4bb/15749341381.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16099cecae96cd---bunala.pdf
    • http://dentalclinicbangalore.com/uploads/jerewe.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1c336a6403---japuxibobolegetagesulagod.pdf
    • https://maggies-handmade.com/UserFiles/files/42943742491.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160dca1fdc525e---dojumosinovinuruteluzoge.pdf
    • https://hosvagyok.hu/userfiles/file/veruwepij.pdf

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