Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bbf7946922ab6e6…

MALICIOUS

PDF

86.1 KB Created: 2021-07-01 10:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9fdc4422aac39d085eb3329f91932f5e SHA-1: c2295ef14ff8df19e196c185f229c35faf05e0d8 SHA-256: 9bbf7946922ab6e634994e28cfbf4b271a00daf17a52f7095b4490387e275ca3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous URLs pointing to domains that appear to be compromised WordPress uploads or disposable hosting. These links likely serve as lures for phishing attacks or to distribute further malicious content. No scripts were extracted from this sample, but the presence of many external links suggests an intent to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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
  • 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://infrive.ru/uplcv?utm_term=can+vs+to+be+able+to PDF link annotation
    • http://fine-cottage.ru/userfiles/files/tafogudobedefi.pdfIn PDF document text
    • http://bhs-class1957.com/clients/35434/File/dapiven.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/m2fe4pj1tlqgro9tp5vn3q0pbd/47016045031.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/jixexugovogusomekoxotuva.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/divox.pdfIn PDF document text
    • http://southwest66reunion.com/clients/f/f6/f6f8b7bd17d60304c359e527a2c43449/File/jifikubajovejane.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608751cb0cabb---mirotuzazewemexaxori.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/9b4edd4172f2fa6089c4cc1b91af038d/navebemu.pdfIn PDF document text
    • http://haisushitogo.com/uploads/files/kasoxaf.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1de33570c---93904027817.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c192aecba51---97549666258.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/c29aade5a2f9ea9aa06b4119cab1b2fa/vumimoxefemubaxefa.pdfIn PDF document text
    • http://eraucheta.ru/uploads/file/7790147979.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/823cd66b9eb637b18163dadfb59d5e72/davutixuwilisu.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bd99ec0f283---lajodowubupifima.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/a9870a69e8a2d1b5cac39392ea5d048e/11879122650.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1609aaa1aee676---rukuva.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210529055713_1629147414.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a8fed2831---76621449531.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/21661020867.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4404e214da---korusezobokajarugofe.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/7265215460.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_off0000e33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33D 28984 bytes
SHA-256: f392677940bb1bc2ad580f31eefbc2ba67e5d13772ad2563e75a8802064f4c81
font_01_sfnt_off00011c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001347b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1347B 10148 bytes
SHA-256: 7acd0c348962dc7ebd97c2578a9710b110fbf252c58ee08debc6f5764f1a82cd

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