Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbddd5ea7ccd2199…

MALICIOUS

PDF

87.7 KB Created: 2021-06-28 07:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c836865cee82542160061b2e60d31436 SHA-1: 0fb3010073b7db3d38a1d57fab9799111cb93785 SHA-256: fbddd5ea7ccd2199045d296d9ac21e5451ecb8fd9e99dfb5ee217135d9df130e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress uploads and other disposable hosting sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is a phishing or malware distribution vehicle. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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.
  • 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://oniceh.ru/uplcv?utm_term=shortest+day+of+the+year+2017
    • http://amon-syotengai.com/userfiles/file/13754209818.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/uq9ndk57g8c46q4702ahmolnt2/naxuduse.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/khtb1vdrgpt52ggms373kpcqi0/42698568070.pdf
    • http://canadanur.com/resimler/files/lobiranusemixupibof.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/f39f480b3b7c11b30c1040f8d34559c0/bozosurup.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/069fd5c254f94c96b4e0f7573fef2ccb/satavigof.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/aqqjuc15frq788kuso8cfm53uc/50002958514.pdf
    • http://seanmore.com/userData/board/file/93316957057.pdf
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a93200dfc7---jupuwexozuxufal.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/67ikrnv2enhuivcelnd1gd9lmj/wuwipodepizepatelajuwuv.pdf
    • https://nestsearch.in/admin/uploads/file/78657931188.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/aro39p409ar1m2fk06dn2i2llv/tisiraseparijakele.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/omvvonngn09vaak75j8vrg60a5/70902516459.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/44f805dae391924b5566e59ff167023b/44614041117.pdf
    • https://jamurgoreng.net/contents//files/tuduxi.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/b6a2d808bb5164cde5ee3ede52a6e22e/masipuw.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b04d38a4c2e---pidojuvuwaxulabimitofu.pdf
    • https://psfund.org/public/uploads/files/cms_files/17501917023.pdf
    • http://dges.in/userfiles/file/55148492615.pdf
    • http://liveisagenix.com/ckfinder/userfiles/files/dimejetegaduxudafi.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/0b268554d079b09f4f42b268bf4c6c9c/noridalopexojunenujaf.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a7d663e72---gezoporanugevibasafa.pdf
    • http://igorodstore.ru/files/userfiles/files/60045673278.pdf
    • https://actor-conseil.com/files/file/larufo.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_off0000f314.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF314 16792 bytes
font_01_sfnt_off00010b26.bin
fa56bdfae6daa6a5d865ed0322850f359da9ef024354cac94a305e0ed2e07ae6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B26 17260 bytes
font_02_sfnt_off00013853.bin
d9c7823e00ec47eb17d3a1bb59d1280b7674c6351b67b54a7f3038f5fced93e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x13853 10740 bytes