Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c6dc37ffd289b5f…

MALICIOUS

PDF

83.3 KB Created: 2021-06-27 01:19:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef7a0f0a79c73e329180aa7ce4d7d420 SHA-1: 82c579d4529acd4daaf30895c95127eea16124c5 SHA-256: 6c6dc37ffd289b5f4ec1718a14ab2e282d55f53b359dd579981f03c09f85a6c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. It functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://medvor.ru/uplcv?utm_term=spray+painting+with+toothbrush+easy
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/jibofakeji.pdf
    • http://31kouqiang.com/userfiles/file/1622646973.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160762252199b1---32713859735.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a242d432030---44321561610.pdf
    • http://imaginove.eu/data/Files/19826792876.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160916f822487a---59412235016.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/b6657a4ee3d5d5c1fe4c19f3d23be412/pebiruluwufuzegavun.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087446936f31---93546540179.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecacdde2e8---2426894217.pdf
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/0a69b4b73f81f1b8a3a68e6429819793/newirawirakev.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/iqa1fcouh529c9dn3mv7gl6fd1/41865489554.pdf
    • http://gute-reise.ru/i/files/files/86890446267.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d748ce85743---wumel.pdf
    • http://www.petercar0937494634.com/upload/img/files/fubuzatatevanetofexu.pdf
    • https://sca-kc.net/scauserfiles/files/7534434155.pdf
    • http://pileshoppen.dk/userfiles/file/76570266330.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/55ab09b38c2039f0cdc8bc78640e716e/lunelewusibigasolower.pdf
    • http://abnicum.com/files/file/pavaziwuzodiru.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ec887ff5cd5c845b95f593117ac72400/dumixenizoludiw.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/effcac9add873dabd9d5a469d898bf56/fowutow.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1e60ec7dc---simumaminij.pdf
    • http://vksraja.in/fckeditor/upload/file/6429095306.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_off0000e4a1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A1 16792 bytes
font_01_sfnt_off0000fcb8.bin
922917d1e9f1a9b5a469b882579ebd21974d940586b751f0df101890a3878fb4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB8 11000 bytes
font_02_sfnt_off00011610.bin
364661f751aa6d19ff541392b597e3b18936b4484258a90879bdcac810a91ae7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11610 16400 bytes