Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c4c6658c0e05080…

MALICIOUS

PDF

69.0 KB Created: 2021-09-25 02:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c1eeea3dba2bc963359195291a47d9a0 SHA-1: 620aeb5ef0d5bc89f51988a7a9bd6409892e641f SHA-256: 0c4c6658c0e05080fa727a815cc285324e963cb916c298c253f6a59223b4f0c9
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including a screenshot disguised as content and embedded links to external domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or conducting phishing attacks. The document's structure and embedded URLs suggest it is part of a campaign to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://genegurumiraclehealer.com/userfiles/file/polovebanalelojujir.pdf
    • http://thedewakohchang.com/image/upload/File/0755604044.pdf
    • http://istvietnam.com/rich_editor/file/78953276975.pdf
    • http://canavesiobruno-architetti.it/userfiles/files/10522486438.pdf
    • http://gesht.ru/admin/ckfinder/userfiles/files/tubizusuvigamobadoket.pdf
    • https://kompaspt2.com/contents/files/wibenulalomowabaminuzeku.pdf
    • http://hagelkonzept.de/userfiles/file/12338737647.pdf
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sugevopuvonafij.pdf
    • http://infinity-c-t.com/userfiles/file/mekalumiguf.pdf
    • https://anbc31.iscriptscloud.com/app/webroot/files/file/77103041900.pdf
    • http://kwong-cheong.com/userfiles/vimuwuxinexigasotajowu.pdf
    • http://strap.sk/uploads/files/kabururif.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f3a4e0e5af---sinagalevav.pdf
    • https://mdteam.se/ckfinder/userfiles/files/74196903620.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/c1ccd9990a4f81ef8b2d9ef5953c2ea5/36761002713.pdf
    • https://nepalmicrofinancesummit.org/userfiles/files/xoweduxanid.pdf
    • http://fcgo.tw/uploadpic/files/vekazexeximatulufusas.pdf
    • http://tw-jia.com/uploads/files/202109191542391122.pdf
    • https://dazhonghua1688.com/ckfinder/userfiles/files/wazirixitusabubosuxu.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/a5707532c4306120d7f7454bfbdfaf73/kaburexofuzopuvawipa.pdf
    • https://intekcanada.com/ckfinder/userfiles/files/76626567939.pdf
    • https://nexapos.com/upload/files/rebimatizevesozuloxugo.pdf
    • http://drivingtesttips.ie/fckeditor/userfiles/file/97860801581.pdf
    • http://gewald.ru/content/Files/79796015903.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=instagram+lite+install
    • 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_off0000b2ff.bin
c0d2a8ebceafe04c9fd7b7b5c98d7087caeacc06fe016ae803894140f1fc967c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2FF 14520 bytes
font_01_sfnt_off0000d711.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD711 16792 bytes
font_02_sfnt_off0000ef28.bin
28d700f4d7386246c4da398d719037368e1f6fb49271ea280af0b13db0c44f24		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF28 10280 bytes

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