Malicious PDF — malware analysis report

Static analysis result for SHA-256 413fa7ca64da2072…

MALICIOUS

PDF

76.7 KB Created: 2021-09-09 23:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f63c5c18c198d98d2d8edc64ee2ea442 SHA-1: adba1bf389009554939ca9d1ffd78b2575f9800b SHA-256: 413fa7ca64da2072d9f9088694eac5bc601270cc88a8507037ba7c9fe3138d29
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to malicious content or phishing sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a deliberate attempt to obscure the final destination and potentially evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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://billionbosses.com/ckfinder/userfiles/files/xoritapanezaw.pdf In PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/161331a8409377---87179729973.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/ipol.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/pagiki.pdfIn PDF document text
    • http://pizzeriagiganti.ro/imagini_ws/bepijetupidipasenukogo.pdfIn PDF document text
    • https://www.domosystem.gr/ckfinder/userfiles/files/magoruwikosuxevo.pdfIn PDF document text
    • http://test-immo.com/file/97044150149.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/18998245293.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/raxuziraduv.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/59969109860.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/dofiboxudiwowazeratiki.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/43922096947.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library/File/91265945267.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/bibotunevuwub.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/40304440278.pdfIn PDF document text
    • https://nhahangbienhaitien.com/uploads/files/fenate.pdfIn PDF document text
    • http://7sate.com/filespath/files/20210906044823.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/tavorekupifazuwedumor.pdfIn PDF document text
    • https://sanvexe.vn/webroot/img/files/kidejax.pdfIn PDF document text
    • http://hnfhdc.com/UpLoadFile/2021090910532291759.pdfIn PDF document text
    • https://bselink.com/userfiles/file/wasub.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/16929488048.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613577b55a5db---datojibabuxokamira.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=madea+farewell+play+full+movie+free+onlinePDF 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_off0000c5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C9 17312 bytes
SHA-256: 304e934cb96f55204d06b38858cd0d9c7c1b97bfbac22eb4cf1f48ca154740a4
font_01_sfnt_off0000f2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABC 10752 bytes
SHA-256: 9641a22c7e4e0c787472d3e37806be894490569d6d355e494a26bebc8d1b7a3a

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