Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d69587080ae37d9…

MALICIOUS

PDF

88.9 KB Created: 2021-07-15 17:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: e7fede27301cb181f0079073b829e6d1 SHA-1: b6ffa818e67e405c28ed8a46f05ef91df89575c0 SHA-256: 7d69587080ae37d9001c1caa649d2cf83f4bff9bf78ea05376b2837605af8631
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious or phishing content. The presence of these links and the nature of the detection indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://laborke.ru/uplcv?utm_term=phil%27s+fish+house PDF link annotation
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/lgkej7s9e4rrjdh5nko1arbl5c/34074674478.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/fc8aa51d850ac5163b1c25bb0f8d9622/zugidajemida.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/bgdb8t751b7q4vq1jjqrts793c/46883246765.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/takasatituvujiwinisotasad.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/c101436999a532d85f76ec6c196fff4f/32457346360.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/93535951789.pdfIn PDF document text
    • https://ntwbearing.com/UserFiles/File/94028285821.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/62158878669.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d64d6af01---dajalikivek.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/golonutigubaxa.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fade2192b6---kifisotipanegulanarikine.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/lumekusufabip.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bde0e468a0d---51976049155.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f370b837a3b667bfd0c3cc8329484645/77468277921.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/92598130804.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/92178332490.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f13a8db87f---pawuma.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d82fbd324b---witegopigoputosexe.pdfIn PDF document text
    • http://wingmanplanningdemo.com/userfiles/files/78488719066.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/36134954058.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/1596347337.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/a20fe388fcac505aa93e46d48792c78b/zekuro.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/46pa5oat8rniklaem4ugpm7ifc/14399825522.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/fcc1a222c958d3248fa494cbfe08c0e2/tozotigodifude.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3A 9984 bytes
SHA-256: afb421e9d856e420253a3e688dd35790de2fe3bf847dcf94465527705ba8c71b
font_01_sfnt_off0001107a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107A 17500 bytes
SHA-256: f2955d36349dac777ea70abb4766a0d7a7268736488e7223df51454c7bbaae98
font_02_sfnt_off00013e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1