Malicious PDF — malware analysis report

Static analysis result for SHA-256 af3bbc569755d743…

MALICIOUS

PDF

85.5 KB Created: 2021-06-30 17:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ba47443f66812971d7c4a8f892de3290 SHA-1: 8b8b902636398fe58d5f4bb516514da43f6ea130 SHA-256: af3bbc569755d74338314805d0432c87d39bd1cb324ee275606313f7c284f424
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many hosted on potentially compromised or disposable domains, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of multiple external URIs and link farm heuristics points towards an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://drafthe.ru/uplcv?utm_term=corrasion+definition+geography
    • http://onlinetradeshow.ir/uploads/files/15280882148.pdf
    • http://travellightnepal.com/userfiles/file/torot.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/da3f0ad91001aeaf74bbc00102a47cfb/40414577413.pdf
    • https://yar-net.ru/userfiles/file/bimer.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/heo07nj7mmlaqajj4cbdpqejg0/fapiduwefivupon.pdf
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/kdesppnnpv5p8nfqc169spolmr/wijemajufimofem.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826328b3943---tiwugawojizedupana.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/0366f58dbd748e3f7565e0f2b0f0ac1f/41322683105.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1b37823e8---nuxixepidojovixegexemif.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0f220dd62---40253618282.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d43426c12---nexolesumububidoj.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/f8p5bd24qaisjv7burdutnlgc1/rosejenaj.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa49d2bdd0b---zuraramupixirudi.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/850fa71657fbf175b4a0101fe0c001ec/wunikixowuzonak.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/uubihgqo820rjnnk0bklloom74/xamejuviniwo.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/bc5a76f60cbb44f1a7b1aa6df80db623/tivofobekipira.pdf
    • https://xlspandoek.nl/userfiles/file/walurajaxi.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/41092e8bc53f76e9f922c50d0c764487/90099676732.pdf
    • http://ddaengshop.com/ckupload/files/medenodakoxuxerebidufukol.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e331f9864a---79743458319.pdf
    • https://invest.pl/userfiles/file/xojoxobu.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/e0a10247840c5688824984a5c4eb6a54/wenikuked.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/9b59d748f6bdf3c7373cfe3fd204e1d5/84977243522.pdf
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7eb69ebf1c---zezamibiferezirep.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_off0000ec28.bin
d5682a90042d96e662175bd7fe8be1f98373d1daf956c333ee2c85c4464fadb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC28 16856 bytes
font_01_sfnt_off000117c2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117C2 16792 bytes
font_02_sfnt_off00012fd9.bin
8c326c46587d5fac814717b7c3d37851b973e9bc562e825eb34528b538132bfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD9 10876 bytes

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