Malicious PDF — malware analysis report

Static analysis result for SHA-256 422ee80a3b254008…

MALICIOUS

PDF

88.6 KB Created: 2021-08-09 23:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a68d2a4e3571999f4e8c0890994240e6 SHA-1: bd174633f5bdc61d06d44d4da29e75dac05492cb SHA-256: 422ee80a3b25400861e90c1336a849ab8ef8250085e7eb3df01d8707e59fc794
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing or malware distribution lure. It contains embedded JavaScript and a link farm pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://daquin-ferriere.fr/userfiles/file/32423579128.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/7uljdj3iorucollc317ik2e55q/57623709361.pdf
    • http://afra24.com/basefile/afra24/files/biriravamojuferebenuzo.pdf
    • http://garage-ys.info/js/upload/files/19766575879.pdf
    • http://cpspcb.com/uploads/files/wepukesuvotetizuvumeroxef.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/q8qggdqlsrb2uo47pllk6vm667/zasewexateforune.pdf
    • http://everettsbarbque.com/clients/b/b0/b0b566c85bab127526a414587b81487f/File/5603214530.pdf
    • http://whatifitspossible.com/ckfinder/userfiles/files/zojoguvusugaxubosen.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ec4ee7591---98493394018.pdf
    • https://egyptsuntours.com/userfiles/files/rinad.pdf
    • http://ventiliatoriai.lt/js/ckfinder/userfiles/files/kufatanedavukosajusinalot.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16106c59782a39---zorukixaditakojugu.pdf
    • http://ytbozhuo.com/upload/file/20060801989.pdf
    • http://andrelandberg.com/userfiles/file/dadarikolofobu.pdf
    • http://laiyi-art.com/userfiles/file/vixuzokibon.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/356e815e58373f06b5c0ea73fc86725c/xaxalupakemiv.pdf
    • http://www.pattyn360.com/upload/forum/files/38339048974.pdf
    • http://travelshops.pl/userfiles/file/2579722573.pdf
    • http://barsugo.com/ckfinder/userfiles/files/69854382417.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bb341623e---rebimawafisuta.pdf
    • http://gernano.eu/gfx/userfiles/files/87312059690.pdf
    • http://tribo.kz/userfiles/File/66440674502.pdf
    • https://actor-conseil.com/files/file/segapogepiwowolinuxojaxot.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=happy+wheels+free+download+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_off0000f678.bin
0b65dff106095e752faf39d1cfcf392ce5a792a327e61efbde04ee938da41556
pdf-font-stream PDF embedded font (sfnt) at offset 0xF678 10688 bytes
font_01_sfnt_off00010ef7.bin
2d21aa1d8027b6356087d0b15510c50403fe332d54c1e5b81241bc0b925521bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF7 17072 bytes
font_02_sfnt_off00013ba7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA7 16792 bytes