Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8afefe3c350cedc…

MALICIOUS

PDF

81.0 KB Created: 2021-09-15 23:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f90f1ea41d1287773608480d836acdce SHA-1: 2b781e7f797114b0b02cbe58a5d658c2df3fbef2 SHA-256: e8afefe3c350cedc601c153055aa531b4d7dd5264b59ce8bd2809c022c5128b1
166 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic suggests the document is designed to trick the user into installing malicious software by posing as a necessary browser update or extension. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://klemanpince.hu/files/file/52542235311.pdf
    • https://inprovit.com/ckfinder/userfiles/files/feleva.pdf
    • http://www.gpkoaee.ru/ckfinder/userfiles/files/42573489002.pdf
    • http://domusanna.it/userfiles/files/51929683895.pdf
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/51954487554.pdf
    • https://nakatarikaszel.pl/app/webroot/userfiles/file/33522288662.pdf
    • http://bajkolandia-leszno.pl/userfiles/file/xuvenapudowuneso.pdf
    • http://cjmfgx.morefriendship.com/upload/files/98201980003.pdf
    • https://mygoaltv.org/ipp/images/uploads/files/wironajujemobi.pdf
    • http://studiochiodo.eu/userfiles/files/vavuxukafagakifuf.pdf
    • https://maritime-models.com/userfiles/file/zagejez.pdf
    • http://flemingdecal.com/uploads/assets/file/49455782404.pdf
    • http://www.premiumimport.nl/ckfinder/userfiles/files/86894584011.pdf
    • http://imaginove.eu/data/Files/lurifexivafivavaf.pdf
    • http://aliguoriarchitetto.eu/userfiles/files/kipoxaraju.pdf
    • http://blueview.nl/app/webroot/files/userfiles/files/17292970949.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/e9bec88a0904e1dd7d973a21f72663ec/luxarema.pdf
    • https://underworldgear.com/admin/images/fckImg/file/19257289068.pdf
    • http://ellenia3.eu/userfiles/files/2343971756.pdf
    • http://dietetyka-24.pl/images/files/mupewakenunove.pdf
    • http://micruts.org/userfiles/file/44101899309.pdf
    • http://hjhchem.com/upload/files/lelufugatig.pdf
    • http://limoride.net/gallery/file/mitivino.pdf
    • http://rococosofa.com/files/files/47538126551.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=alia+bhatt+star+life+mod+apk
    • 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_off0000d2ad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AD 16792 bytes
font_01_sfnt_off0000eac4.bin
204906ebef4153fc4a8f81d96a804ffec7faca8a44035b0da311cda314b23975		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC4 10872 bytes
font_02_sfnt_off000103b7.bin
58d7b056063b4958c681156aa9f31cd208f7b6f7fdefafcd6d486cde1a6e5fd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103B7 18968 bytes

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