Malicious PDF — malware analysis report

Static analysis result for SHA-256 b97242833ff7ab1e…

MALICIOUS

PDF

83.0 KB Created: 2021-10-08 20:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 65561f1b4cec8b6801b2ebe83bad766f SHA-1: c2b8205c04b239b157560f4e4fc527c8c490fd7f SHA-256: b97242833ff7ab1e6b20bf9f6c668cf1b99e76963f56aca33d1ca41e0f6af8ad
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm pointing to numerous external PDF files. The presence of embedded URLs and the nature of the heuristics suggest this file is part of a phishing or malware distribution campaign, likely delivered as a spearphishing attachment. No scripts were extracted, limiting the analysis of specific execution chains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://sofupingame.net/calisma2/files/uploads/jegibopopazunu.pdf In PDF document text
    • https://allegypttours.net/userfiles/files/1408563366.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/48625795296.pdfIn PDF document text
    • https://onecre.com/images/content/files/nodimaxebavunopetab.pdfIn PDF document text
    • http://trumoi-khutrung.com/upload/files/fotobazotegidotomob.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/milat.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/xusexigojiwiketojegov.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/xibuxova.pdfIn PDF document text
    • https://cs168.tw/upfiles/editor/files/45094258656.pdfIn PDF document text
    • http://tw-tms.com/uploadpic/xw/files/dumimagadejotox.pdfIn PDF document text
    • https://www.opsclown.it/ckfinder/userfiles/files/zojipoxamugelat.pdfIn PDF document text
    • http://studiocariola.com/userfiles/files/juvalevuk.pdfIn PDF document text
    • https://rajakedua.com/contents/files/69265311395.pdfIn PDF document text
    • http://phukiendoxe.com/media/ftp/file/zuliwubifowalo.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/xetonolemuribusinef.pdfIn PDF document text
    • http://hodori247.com/uploads/files/wiguwof.pdfIn PDF document text
    • http://tulga.ru/editor/files/zojenawodenip.pdfIn PDF document text
    • http://smartdeal.pl/files/upload/files/tagazav.pdfIn PDF document text
    • https://terlickodds.cz/www/www/fckphotos/file/40868161921.pdfIn PDF document text
    • http://drukarnia-warszawa.pl/pliki/file/tuwofas.pdfIn PDF document text
    • http://futboltotal.net/images/files/46837269920.pdfIn PDF document text
    • http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mepulukukusa.pdfIn PDF document text
    • https://siahotel.com/userfiles/files/sexokokisabudatux.pdfIn PDF document text
    • http://fitviewer.de/files/file/zodijagegeso.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/vejelogup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=nystatin+for+adultsPDF 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_off0000db46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF358 19744 bytes
SHA-256: 35e616470d2db5ea4f619983a75f623f943f549862e251573ac575e135148d43
font_02_sfnt_off000126c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C1 10404 bytes
SHA-256: 72102b703a1d91419eb83017decf5c7ccb6633086fc0c0b002aec15cfc49c370

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