Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d2d676761e591a…

MALICIOUS

PDF

80.0 KB Created: 2021-07-28 08:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 748e2b47b5e9ea5c09d2709cd8f07504 SHA-1: 83547be665d5a87cb93b567ef77624c79199c5ca SHA-256: a0d2d676761e591ae24837f424ff3df8767bdc937c42eb74fa68998660232e47
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution through these links. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7470

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://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/cbcurh99d9obrke7ohc6o4ej76/77154885360.pdf In PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/1aba76bdf6f442b5bd791b1baa581b99/pegapumixeg.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/guvemasomaradovoxitonol.pdfIn PDF document text
    • https://xn--80aanugxqi.xn--p1ai/admin/ckfinder/userfiles/files/27437882484.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609230df6280b---83959053543.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/41031765815be34c3138e38d3b14a902/62074796538.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/49230eb82afd62203f46788499f48634/48048763949.pdfIn PDF document text
    • http://krajinar.cz/soubory/files/sedome.pdfIn PDF document text
    • https://pisangmanis.com/contents//files/99949438871.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160cabe57a21d9---zogilazopago.pdfIn PDF document text
    • https://belloverde.net/emailer/file/52100121253.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/520ad7ad9ba64975def87e4655740f9a/kixenotele.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/tunutes.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/71d65e55bcdd2adabbf8892c41689742/wovedeti.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/lofifusafut.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca78b26078---vatajurifuko.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/40914083422.pdfIn PDF document text
    • https://nguyenthelong.net/userfiles/files/birolevidesudokekip.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/50049862954.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/nasotumorafewukawis.pdfIn PDF document text
    • http://belovosushi.ru/files/jolibu.pdfIn PDF document text
    • https://areicon.com/images/file/991049883.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca42735bea---rafurofatejigigarizot.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210622144609_0rmsu8.pdfIn PDF document text
    • http://domgr11.ru/uploads/files/86904509910.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=free+fortnite+accounts+email+and+password+ps4+no+human+verificationPDF link annotation
    • 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_off0000f9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D9 17000 bytes
SHA-256: 7bffd4d8febd0b46783041007667fce8480617def22b533d9d9712e5267b8770
font_01_sfnt_off00012655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12655 11192 bytes
SHA-256: b7014c00bf05d91aa7725daabe29eb2cfbd5b7dad4a5553fb2d19393936371cd