Malicious PDF — malware analysis report

Static analysis result for SHA-256 a202896469c5c19e…

MALICIOUS

PDF

85.3 KB Created: 2021-10-13 16:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 18db75dd6f0f7035b02f6f75278056cf SHA-1: 8f0ef3d4a12d81cba4d35c63fc44ac333efd5927 SHA-256: a202896469c5c19ee96328853eb6c60907c663d5a9204ecf1d429ccca0516b8b
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier flagging it as a phishing trojan. The presence of numerous external URIs, many pointing to PDF files on disposable hosting, suggests a link farm or redirection mechanism designed to lead users to malicious content. The 'QR_LURE' heuristic indicates a potential attempt to trick users into scanning a QR code, further supporting a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://garglob.ru/uplcv?utm_term=smith+and+hogan+criminal+law+pdf+download
    • https://hiddencliff.kr/FileData/ckfinder/files/20210914_13DA3D265B64E544.pdf
    • http://landia-print.com/pdir/file/62076297091.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d0ae7eec3---pirixanitewupu.pdf
    • http://aow.infogestnet.it/ckfinder/userfiles/files/38117679337.pdf
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/lunogabupoguvalo.pdf
    • https://qpshouse.com/upload/image/file/dotimezorabefon.pdf
    • http://jjsgreatescape.com/uploaded_files/userfiles/files/15543590012.pdf
    • http://brezov-gaj.si/uporabnik/file/84660588408.pdf
    • https://kamhosting.nl/ckfinder/userfiles/files/87065517586.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/19e923100fa078a94f871ba439ae2c26/25047985719.pdf
    • http://imi.vc/upload/files/nojevovedineferiledewe.pdf
    • https://study-abroad-travel.com/ckfinder/userfiles/file/63675099382.pdf
    • https://renetravel.ro/images/files/29053318826.pdf
    • http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/51844635920.pdf
    • http://qataminational.com/uploaded_files/userfiles/files/85642830999.pdf
    • http://kool-house.com/upload/editor/file/63716616318.pdf
    • http://arniestribu.com/campannas/file/gadotebewowixotupoboz.pdf
    • http://batiment-tunisie.com/userfiles/file/1911793530.pdf
    • http://esoftland.com/userfiles/file/77017560675.pdf
    • http://www.ciesol.com/ckfinder/userfiles/files/xariro.pdf
    • http://emploi.nat.tn/ckeditor/ckfinder/userfiles/files/toseresodamitine.pdf
    • https://www.clinicaepilepsia.cl/ckfinder/userfiles/files/2137195711.pdf
    • https://kccegis.com/upfiles/content/file/20210919162459.pdf
    • http://mediedil.eu/userfiles/files/falulezuxusuwuxazeza.pdf
    • 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_off0000e1b0.bin
35bfb48a126ca4f359b7f38ac2ed819c4b360bd6733ee36941c74ec4a662300e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B0 19820 bytes
font_01_sfnt_off00011679.bin
98621f16314803b8566c4ce687667d86b6f226172230b38fb92d31c5b231d1d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11679 10928 bytes
font_02_sfnt_off00012f67.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F67 16792 bytes

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