Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ca1f14186182e6…

MALICIOUS

PDF

73.5 KB Created: 2021-05-26 23:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0968b3c6491b507028dfbba2410e0bee SHA-1: 12d02d4980cd54fcd1d15f4b89129ace86435fb3 SHA-256: 67ca1f14186182e6b31ad96b64c74d8387ba2f035ef0f446d359e340f6e2183a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan distribution attempt. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting it functions as a link farm to redirect users to malicious content. The presence of 'jailbreak auto rob hack' in a URL parameter indicates a lure to attract users interested in illicit activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8924

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://queure.ru/uplcv?utm_term=jailbreak+auto+rob+hack
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084a3cd8c7f8---biruxefarirowerudupa.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/915bb480a1862b10aa1bd32f14125fec/zavut.pdf
    • https://communeouchamps.fr/userfiles/file/27381950826.pdf
    • http://dok-vo.ru/userfiles/file/25054821817.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b80868437---3493488841.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/17069eef14cb948008a5b00730b5ed80/dagatafipimapozasozogot.pdf
    • https://oddluzanie.net/userfiles/file/51901679640.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855bb872ede---dijolijaninajazi.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb9356ebd3---rafenalebopudusiw.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/791853293a92d766a6503fee007ba7f5/nalezufusa.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b0c890dac---biregupenipo.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/97f60f213339fcee8f1801e1d9c04656/nefisamilerubunutagupin.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160982f1ccc0f5---pubazekuriwoneripuramavig.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aaaac431099---tutebojej.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/7b610dbdf51c2f0702b84d973b52d17a/82571699299.pdf
    • http://iziusb.com/userfiles//file/94892759950.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cde.bin
cc03f7fc00c2e3625db5f2394a37f9a14af1b5810bf45151596d225bf07c7272		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDE 4676 bytes

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