Malicious PDF — malware analysis report

Static analysis result for SHA-256 95de43ab796027a9…

MALICIOUS

PDF

81.5 KB Created: 2021-10-12 14:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ed6cb6be1989272735b1b29617a717cd SHA-1: b8a99fc6adfe802a5808553cdba166452c9af8d3 SHA-256: 95de43ab796027a9f273913e44dbf8d83210244903cc00accdc9eb86112ae559
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains a link farm directing to numerous URLs, several of which are hosted on compromised WordPress sites, indicating a potential distribution point for malicious content. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/medifizezigubejajip.pdf In PDF document text
    • https://resulgame.com/calisma2/files/uploads/jobiniti.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/2e361ebeb071710983a1fa9891dcb9f4/59406602255.pdfIn PDF document text
    • http://sualpturizm.com/userfiles/file/ropuremaposotokizilesabe.pdfIn PDF document text
    • http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/86116354354.pdfIn PDF document text
    • http://alhambra.kopanramen.com/uploads/files/timuza.pdfIn PDF document text
    • http://medwin.kr/userData/board/file/21105667479.pdfIn PDF document text
    • https://www.speeddating.lt/speeddating/ckfinder/userfiles/files/53081878652.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/peluragefugapisagob.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/86797285800.pdfIn PDF document text
    • https://makenie.com/upload/files/jusedozol.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/51374047472.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9f85d30dd---58842554304.pdfIn PDF document text
    • http://paraglider24.de/pics/fotos/1/file/zobabalegomubo.pdfIn PDF document text
    • http://singlesync.com/userfiles/file/rujarelukupaz.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16133f41400134---buforemezabitukiralate.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/82527542167.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b49ed8d671de44dcb943d64cb6a851a8/81355990497.pdfIn PDF document text
    • http://ubest.ru/images/file/kitab.pdfIn PDF document text
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/kisanipepuxugilod.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/84163175832.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/37025384900.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/ulp2fekgljkjl54d0d68p8d9tk/23183563941.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/KGDyd8lM0uI/uplcv?utm_term=age+of+empires+definitive+edition+cheat+enginePDF link annotation
    • 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_off0000d6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC2 11068 bytes
SHA-256: ba0919af3c721e9fe96c368dd2d3e070981a93270ba08c8699a1933d7cfab38a
font_02_sfnt_off00010834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10834 18572 bytes
SHA-256: d9675c595728dfd11d8b849b988997772fa6cb25f1d0d297f885fc3c63651726