Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1a0b79092693832…

MALICIOUS

PDF

86.2 KB Created: 2021-09-09 13:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 230cfc4c0e62f0718de919681e70e9e3 SHA-1: 376ad2a1bbc64288aad21535c35dead5646750a8 SHA-256: d1a0b79092693832089dcfb37b4fbf7a912c6aa904dadcc6e43ba9b9a5f36b1c
166 Risk Score

Malware Insights

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

The PDF contains numerous external links and is flagged by heuristics as a link farm and a browser extension installation lure. ClamAV also detected it as a phishing trojan. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to deceive the user into downloading potentially harmful content or providing credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://pixomot.ru/uplcv?utm_term=chromecast+chrome+tab+android
    • https://razredna-nastava.net/files/raxuzofi.pdf
    • http://homeloanz.net/images/e/file/xegomaposuworakinab.pdf
    • http://freetds.net/userfiles/file/kovobojil.pdf
    • https://simon-daulte.com/ckfinder/userfiles/files/lowukajonu.pdf
    • https://oriental-kitchens.com/userfiles/files/mofor.pdf
    • http://shyjjc.com/v15/Upload/file/202199751513224.pdf
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/mowojisofunopagef.pdf
    • http://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/menapurabibututatedoli.pdf
    • http://cisseo.net/userfiles/files/70316585431.pdf
    • http://ohana1bbq.com/uploads/files/85281803750.pdf
    • http://thibangoto.com/app/webroot/uploads/files/25604964313.pdf
    • http://originalbau.hu/imagesfiles/vepuzunodi.pdf
    • http://imapbook.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/woririfijigimipulo.pdf
    • https://egyiksem.hu/uploads/file/59015835120.pdf
    • http://metallpress.ru/files/xuzukat.pdf
    • http://betheaskssd.com/flash/betheaskssd.com/file/sudapozonek.pdf
    • http://motovelo-nmsk.ru/userfiles/file/manisunuke.pdf
    • https://mosallaesf.ir/uploads/ck/files/rofojejave.pdf
    • http://steelbo.com/uploads/admins/u0/files/20210907201527.pdf
    • https://iaido-iaijutsu.ru/userfiles_exc/tifonejejasogadasagajejux.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_off0000e9f4.bin
4b8c5e127fb1ede7d9c713daa60184371fd32b87a86595e417a055b14b689f3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F4 19072 bytes
font_01_sfnt_off00011af0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF0 16792 bytes
font_02_sfnt_off00013307.bin
657d63b197b924d510e8f58cde93f5b82dccf48c3fecf5ca58615d44a2cd1ea2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13307 10760 bytes

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