Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f2ff64279d0ac8…

MALICIOUS

PDF

65.2 KB Created: 2021-05-27 17:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34e84a2da4f280693f33c67778431394 SHA-1: 0ab2a76f7dad3d0b88147c62765a5365f21fec37 SHA-256: 10f2ff64279d0ac80f0ed3c8c4f72f304f34a1cb536b39c84776467b54ca934c
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8681

Heuristics 5

  • 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.
  • 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 http://asokmontridental.com/userfiles/file/rozomekepavuvutibemo.pdf
    • https://topinsolventa.ro/userfiles/file/wodokuzamamibijipit.pdf
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5e0606bd2---porivej.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/cd1b98e8e6f6652f8c4831832c04dc8d/46893586770.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/88e71568d7e347293778370e4992f00d/67567214497.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092c0cd50ce9---dotixusofubazelerotujapa.pdf
    • https://baohohoanglong.com/userfiles/file/dawevodalipa.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fe7e2410e---94846169439.pdf
    • https://catbasailing.com/upload/fck/file/83167424342.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa2cfd31a0---xabobavovonigusol.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa6549a929---zukazazugerifenu.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e468497bc---volelodovonowatajigoja.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c761299962---73966232461.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/e3947a314c3504cf964706a7182982bd/8503210338.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/64b7a1ce60e4ed012073bc808c20fb2a/93231070871.pdf
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a28f2de9ad8---dajomapux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=fusionner+des+documents+pdf+avec+foxit+reader
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dea5.bin
b37558f84b269ee045a4eb4286eb6542d2c6029ce87b3e3cd2c1270aaf804615		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA5 5352 bytes

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