Malicious PDF — malware analysis report

Static analysis result for SHA-256 17202dfe23e01fcb…

MALICIOUS

PDF

76.8 KB Created: 2021-09-16 13:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d85792f32b05f97c9d66ab29afe65153 SHA-1: 25bed17cd717f0c908b2ddf8dd71c624276776d2 SHA-256: 17202dfe23e01fcb38262c5a4c1e6f71bdacfea90e7787cbd1e469ded024ff0d
156 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 disposable hosting or compromised CMS upload directories, suggesting a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery. No scripts were extracted, but the presence of multiple external links and the overall structure point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://wegofa.com/userfiles/file/rizesabuzogelomexiratuxid.pdf
    • http://shiny-baby.com/fileimage/file/pegogazu.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/bd8c5b0267acc46df28df7c12e63f97e/tonoku.pdf
    • http://laskod.hu/userfiles/file/fadafoxusu.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161323cfd4d860---5078168358.pdf
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/57829852797.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/bc3efa0114b65b7da7e9e2a15f4ec4f6/45398575275.pdf
    • https://ngoctraithaibinhduong.com/uploads/news_file/kagaropezopubexibi.pdf
    • http://cukrarska-vyroba.cz/UserFiles/File/84326245064.pdf
    • http://luisacortesearchitetto.it/userfiles/files/wunimizajovage.pdf
    • https://ekinyalitim.com/depo/sayfaresim/file/5759546726.pdf
    • https://arabadvertise.com/userfiles/files/74305869369.pdf
    • http://pmrs.ps/userfiles/file/wuwimelob.pdf
    • https://frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/5726589887.pdf
    • https://weborder.cloud/userfiles/file///zegedupoliluzunofotiwim.pdf
    • http://thephinhmienbac.com/upload/files/fukogawegobuvunewijaluz.pdf
    • http://istihdamhaberleri.com/upload/ckfinder/files/12399479671.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/22cea8e8408a4fe9719b6135bf8c7f39/jumolarezosasadaz.pdf
    • http://mprime.net/ckfinder/userfiles/files/faboz.pdf
    • http://asustainable.com/global/file/60686142196.pdf
    • http://normel.org/files/upload/file/8069604808.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a91169d2f0---firizuxi.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1614177f0e9d90---tawifegir.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8e2ab12b2---tomosilijule.pdf
    • https://dogathermalhotel.com/resimler/files/bobutot.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=kwai+apk+download+for+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5c6.bin
4421713dadc41c359546f43eafe18d6384c38ec642f02c1eba424879c6bcd151
pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C6 18888 bytes
font_01_sfnt_off0000f617.bin
4c2a2e94669e4c471b97dc780e439b4075a30b8f856ba0a9e5762703aac1e62a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF617 10264 bytes
font_02_sfnt_off00010d36.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D36 16792 bytes