Malicious PDF — malware analysis report

Static analysis result for SHA-256 c07c1614fa0d7359…

MALICIOUS

PDF

87.8 KB Created: 2021-08-11 20:18:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b8accef054fac58887057580d150abe8 SHA-1: 5a26a0b6047f138f7e361e4799b8e524e838d202 SHA-256: c07c1614fa0d7359e8893ee55773e1a53c17179136491705c8c4d07dac160b81
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://pistant.ru/uplcv?utm_term=dragon+ball+z+shin+budokai+2+for+ppsspp+free+download PDF link annotation
    • https://butchercurnow.com/img/shop//contents/97110265643.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac39f7a8ba8---nutaxolarunevanafiwemekum.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b969e4317f---govumodazuremarezafonijav.pdfIn PDF document text
    • http://qkmedica.com/uploads/userfiles/file/vozifewi.pdfIn PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/doparado.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a26047543a0---vajipotadaluwanaju.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/penefubo.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/eb6a5af642058d91eb3f05eda955ba3f/zodeza.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/89871943497.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/97281289787.pdfIn PDF document text
    • http://dzbnf.com/upload/file///14899084797.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/18621340680.pdfIn PDF document text
    • https://maturana.cl/upload/file/mutises.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/bf79b187879435e5afb553b948a1cdc6/7316361895.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/sfgnle3jcne8fvfkbk1krbois0/25846168663.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6afb69aae---54260512295.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bf82607fbe1---64994588909.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/70006813799.pdfIn PDF document text
    • http://jakebenmd.com/clients/0/0e/0eef9d569b11303d075d19626cc6f958/File/43115388773.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/29297417996.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160e3914fb96d8---gabiburoludexevaluwejaso.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/4982040759.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/kujutizopo.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/u53tv9lr0ch6f9humh1cc4nmcf/27027033182.pdfIn PDF document text
    • http://puppies-4u.com/clients/e/e7/e7f09595da74c05d2059c741134300d2/File/21982670675.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a27175d9b---pigenogumowilo.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_off0000f21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21A 11280 bytes
SHA-256: b42bcc9dd6a874ad95db4fc6d98abba85f01c70d85b85716ca92f70122c6ff88
font_01_sfnt_off00010c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12444 17052 bytes
SHA-256: 403d700449415c6a5d9fc9e7d36ece6025d967c2552d45b07dbc126b5edda92b