Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b6d33fa0a5a748b…

MALICIOUS

PDF

84.5 KB Created: 2021-09-21 05:29:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6d16ec468a7785d63b3f7426aa9da28b SHA-1: aeb786e8709d166fe5af72c334550b342995e544 SHA-256: 8b6d33fa0a5a748b21dbe912551037ab8d9fb1fa98afc84764743ba2fbcfd8c4
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded URLs, many of which point to potentially malicious or unknown domains, suggesting a link farm designed to obscure the true destination. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download an archive and provides a password, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16133efc1cc7e4---4536748381.pdf
    • http://dobermanncz.eu/files/85638951428.pdf
    • http://xn--h49al71atridzo.com/userData/board/file/19540935815.pdf
    • http://berallebags.com/UploadFiles/FCKeditor/20210912070449.pdf
    • https://k31szmq42-nu28.com/contents/files/46065201359.pdf
    • http://ydyb.com/filespath/files/20210913125012.pdf
    • http://vietcem.vn/public/default/ckeditor/files/86521885947.pdf
    • http://www.valathors.com/ckfinder/userfiles/files/59324748430.pdf
    • http://heimundsicherheit.de/userfiles/file/mupofimunekirezuval.pdf
    • http://infas.cz/images/wiswig/file/lufikek.pdf
    • https://learnrkb.jugalbandiresearch.com/ckfinder/userfiles/files/78525077600.pdf
    • http://finpacecuador.com/userfiles/file/tezodalipudopetuf.pdf
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137599c3ee6c---60507803727.pdf
    • https://allegypttours.net/userfiles/files/migalaxobarakodajoxaxoxew.pdf
    • http://e-baze.lv/images/site/file/zadilezirekelotowatepimu.pdf
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/siviwizame.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/2a6b94872dfb1b3c501542354b133da0/21470218985.pdf
    • http://medizator.ru/ckfinder/userfiles/files/fawozi.pdf
    • http://abcgsgeds.friendship-match.com/upload/files/79275258465.pdf
    • https://kenhquangcao.vn/uploads/files/39646600433.pdf
    • https://pkbae.rs/files/vapadogawanugejogolas.pdf
    • https://cualuoihoanmy.com/uploads/userfiles/file/tasiroxonosudapawibe.pdf
    • https://momentous-inst.com/uploads/image/files/38353243490.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=wwe+2k20+file+download+for+ppsspp
    • 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_off0000e5b3.bin
df57d4e17333e66b55584385c72aded1dabd7c3cf9908a8ed3d86f6a3c1eeb19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B3 17788 bytes
font_01_sfnt_off000112f8.bin
5253fa13cd23c05f61f615e8bfc4976dc0b29e5e41d42404e1d0df699a4a2178		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112F8 10808 bytes
font_02_sfnt_off00012c10.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C10 16792 bytes

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