Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc4a0b1a103943b1…

MALICIOUS

PDF

76.5 KB Created: 2021-08-14 08:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2b793fbb8f5b0d4cf80202326a396bf1 SHA-1: 9dd88371332175026391670f1aa5f67d15356975 SHA-256: dc4a0b1a103943b1222961d627d64109c1c6bf3fcf2b576574e50c3e2e977325
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and utilize 'utm_term' parameters, suggesting a phishing or spam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to distributing further malware or phishing content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8596

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://archism.ru/uplcv?utm_term=mazhaye+mazhaye+tamil+mp3+song+free+download PDF link annotation
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/n2p4qomafs31n9a3lut699djbf/85524449711.pdfIn PDF document text
    • https://fallsplat.se/file/43411697784.pdfIn PDF document text
    • http://skupka54.ru/upload/m/26626814104.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc34f6edd7---69478918555.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/a7b9c62ad4cfaeeb1057b349dd445614/61303791182.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16097bfca88ac8---volepobesememajexerido.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd809476cf---lipewuwabu.pdfIn PDF document text
    • http://hiddenforrest.net/clients/76790/File/37547106381.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b1976728f---lilizinonufubamefoxoga.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/15088270665.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/219e7fa2b43476a5c7aa9663f34392f6/94870729426.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/86524974966.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4f0d11ad3---wolijisusukovadogofidokop.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/9928970927.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/75202767026.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/55559740856.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/ponosegivazezonivoras.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/00305d37b0dc9db6b107d1b771aaa5af/79104143148.pdfIn PDF document text
    • https://activepymes.com/pub/file/55733149184.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/9v0sdsouu4getipq7k30oe7496/70725101768.pdfIn PDF document text
    • http://sqx.cc/upImgFile/file/20210513175127.pdfIn PDF document text
    • https://schilderlesvakantie.nl/ckfinder/userfiles/files/15282318369.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/gikeb.pdfIn PDF document text
    • http://lamorenj.com/userfiles/file/janerumibapoz.pdfIn PDF document text
    • http://unityproductions.com/upload/files/fefaxireduwirokupelurilo.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11711 11372 bytes
SHA-256: 5a2dcf8fd035160daf8f5695946aafcffc4eec7481df3299e1faa6d82f888f5d

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