Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9787c02ad4aa5a3…

MALICIOUS

PDF

188.9 KB Created: 2021-06-27 17:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4f5f91200230dd1cba172cbbb921a1e7 SHA-1: 3d241babcf51b66c187a865cf067ebc59427211c SHA-256: c9787c02ad4aa5a3b533936566d33fed3721eb312dcd40bbab91fe1dde63ecfc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is classified as malicious, exhibiting characteristics of an advance-fee scam. It contains numerous links to external websites, many of which appear to be part of a link farm hosted on disposable or compromised domains, suggesting an attempt to distribute malicious content or phish for information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://queure.ru/uplcv?utm_term=premature+baby+problems
    • http://ks4073.com/file_media/file_image/file/5829263367.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ccd6bb166---negumebakaguzab.pdf
    • https://boumqueur-edition.com/upload/fckeditor/file/dabodefezadarexegokanoji.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0a400f45c---4578195424.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737299e9142---lomoniwigobefuxokapek.pdf
    • https://aluminiosarla.com/userfiles_arla/files/zaruxelesolujeduseguvelu.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609622670cc0e---wunevized.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077261dcc23b---ginexizigazetagururo.pdf
    • http://maciejabramowicz.pl/upload/files/file/45241671935.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/26d3d6877bcd41a7ba909d0edcf855dc/14411940125.pdf
    • https://atlastoursntravels.com/userfiles/file/tewamexetunep.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/j8vgi7mnkcr71a2ajif4uv51pp/64477794376.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfd51741d5---pavitozetepinavugalo.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b75c1813285---89827451591.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc056aa10d---96362143195.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c53b92dad67---38858252921.pdf
    • http://garderoba.sk/images/_file/falom.pdf
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/bff0408c5c5e483abf176d5902001b1d/molarefafupa.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160935103719fc---88910227679.pdf
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/76874850787.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/nors16luh3qabec028gm6ikog7/98190447207.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba82dac3a43---vanusimonev.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/51501dcb77c6878d61f3dbd4ed05f349/70999720873.pdf
    • http://mini-garden.ru/userfiles/file/89500407719.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e84f1c1b64---75277229677.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_off0002826f.bin
63f67822cef7886cbb994eedb3e3e39f06a57973ca4db91b2d04ed8b2d73fe45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2826F 10572 bytes
font_01_sfnt_off00029a77.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29A77 16792 bytes
font_02_sfnt_off0002b289.bin
a9cc8a6b4131cc6affdded42d4223916a7bfd1a1a8ef26ade06eb52c16bad364		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B289 20004 bytes

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