Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf4acbd31b80eee4…

MALICIOUS

PDF

90.7 KB Created: 2021-09-17 12:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 22f4e4423baca93b1f44905ab1dd0448 SHA-1: 121b402c301cd9b2a95620c9e58e4b27e8a4e415 SHA-256: cf4acbd31b80eee4f543ebecdfb51b77eede02cfd8d6eb0bae1979c7743f0b1d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the link farm heuristic indicate an attempt to lure users to download further payloads or engage in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://wastran.ru/uplcv?utm_term=download+rich+dad+poor+dad+book+pdf PDF link annotation
    • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/43646176709.pdfIn PDF document text
    • http://jfe.hk/userfiles/vevawevozuvesurikexub.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/bezivifadetutumezoj.pdfIn PDF document text
    • https://mmszke.hu/files/file/2514808825.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/fezuxinunexujiruse.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613656152a981---maripivigugenevunipo.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/rulesozidon.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/84277477027.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/50063111159.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/data/editor/file/gudaxejanavaponotexut.pdfIn PDF document text
    • http://hardiebase.com/uploads/assets/filefile/43262947633.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/57950624576.pdfIn PDF document text
    • https://bharatceramics.in/ckfinder/userfiles/files/66183626383.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/12984134396.pdfIn PDF document text
    • http://agmapure.com/upload/files/75480010282.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/fopubilifida.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/50382660294.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/mesemij.pdfIn PDF document text
    • https://datajournonepal.org/files/30289330673.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/161334869d212f---totizu.pdfIn PDF document text
    • http://quantri.thaisonpalacehotel.com/upload/files/wesaxoxexebud.pdfIn PDF document text
    • http://cgemfoco.com.br/ckfinder/userfiles/files/zazaxowelowarukurot.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/59255404191.pdfIn PDF document text
    • http://thietbibepnhahang.net/media/files/93429859223.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_off0000fb47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB47 19392 bytes
SHA-256: 9c47050d5dc48f70b983a394ee3008013017ee64136e892280d5ea0b47b2ec65
font_01_sfnt_off00012cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14512 10636 bytes
SHA-256: 11d8b9e36386f0dbca7de015b4b54425c91fe24232c631933bf50c54e369aead

Open this report in the interactive analyzer, or submit your own file for analysis.