Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a7d9440dfc11ff8…

MALICIOUS

PDF

61.0 KB Created: 2021-05-18 09:38:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4108db2b3f24a4c830cca41502f14cd6 SHA-1: 17302398b1dbc3c90670194237f9355a266a4501 SHA-256: 5a7d9440dfc11ff8a6a7b123eee8c163fb7a139967739de54f8bebb56ba07ba0
174 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains. The document body, though heavily obfuscated, suggests a lure related to movie subtitles, which is a common tactic for distributing malware. The presence of multiple suspicious URLs and the ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8151

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://drafthe.ru/uplcv?utm_term=fast+and+furious+9+full+movie+subtitle+indonesia+layarkaca21
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e0dea3ecb7---96704699816.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ccb7f0b3d9---satavax.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/01b74b42f36d0969353cdef31f4be37a/lepedegeda.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/f623dddf6561b89f30e5688f41265a4f/59013978480.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/40614f66755ec8808c0075244bbe346d/22702076213.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609704aadd08a---8902420798.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/idh5qit42ml71hi7b63btler21/tivaja.pdf
    • http://ahkjt.com/upfile/file/19411402511.pdf
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/7649d5b8175f6d0f7d3116779c389601/11347605803.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821afb7d698---vuwusatifur.pdf
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/f54hnsg6p6a9ubaekkknoev58h/74178352003.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/3353e1b692a7ff351df6460c9f6e7548/26473268303.pdf
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/bbafcabb065742709c37c2eff882ec9f/dakuxumuvurobogose.pdf
    • https://arvikabc.com/images/uploadedimages/file/kidevut.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0232c1f902---4602129877.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b38a4c0a61---56917666031.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160903da44594d---fekabafudukof.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d48a.bin
6f539f80de5794ca05a1afa1976c578ba44c3b28f1722245885e79d3a753cad0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD48A 5828 bytes

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