Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ded0e1d231ee48…

MALICIOUS

PDF

99.1 KB Created: 2021-06-26 11:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c779a254547fb0b7d95bf9f9061da283 SHA-1: bb6015311311470ddaed534d087763c0919453b3 SHA-256: 96ded0e1d231ee4823521b49088c5597903017c2b0d4cb238e036ae334cd2e56
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and multiple external URIs, indicating it is designed to redirect users to potentially malicious websites. The heuristic 'SE_CALLBACK_LURE' suggests a phishing or tech-support scam pretext, likely using the embedded URLs to facilitate this. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9681

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.
  • 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=housing+lottery+waiting+list
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c40772a43d7---jobiwoxokemirokilowis.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/ilmtb97l1mtbv6pb5e7ktpldin/vejaluj.pdf
    • http://2990592.ru/ckfinder/userfiles/files/godefapulixikujin.pdf
    • https://cornerstonelaw.eu/userfiles//file/maxemiko.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/ohjdvbtfo9mij56d70hiv57lsv/fepadipipamubaruxokukage.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/d832a2c3798e731f6fedcc3020fa2ed5/36228932331.pdf
    • http://flyingcarpetclementines.com/userfiles/files/sesuliroge.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfdffeae6c---72478354829.pdf
    • http://pnmanagementsolutions.in/uploads/63571678766.pdf
    • http://abc-tel.ru/data/File/lejerejenesamaperipavufu.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077153ee8fe0---rukesukekom.pdf
    • http://artecgroupservices.com/imagenes/file/zuwediwazenetopez.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4342a8b38---12029345480.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16098350b67947---84669881135.pdf
    • http://nicolalazzarotto.com/userfiles/files/dunibalad.pdf
    • http://menafundinfo.com/userfiles/file/87406361925.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/441fc2c7bb988add631a1f673b3f4e8d/tekuvabako.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086bafd8bfbe---43015935564.pdf
    • http://ridendo.cz/files/file/22175375089.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a86445ca174---zitusuturikotinunako.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/lb53ie8ml1v8ftkg5ad95hn5m6/jozupokegekalipizofaxipi.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b221c4b3c4e---70395466805.pdf
    • http://omg.su/upload/File/89327761745.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e4a42f351---67161789490.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608f60e62e836---95398686079.pdf
    • https://bisnismedsos.com/userfiles/file/30863597842.pdf
    • http://tantos.jp/js/upload/files/90954895655.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011091.bin
0af4cf49088ec584b22c447a03f8a1ea7e11530dd13e68a8142e24c127690004		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11091 10576 bytes
font_01_sfnt_off000128dc.bin
8ef016299a482175ff5f313cf2b5cfcc4175b86393a6c494bdc06754ccb71e55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128DC 2552 bytes
font_02_sfnt_off000133ac.bin
f3b4bd09a4c796948c30a3e8ea6b38aa8ce351444e5ee74971c245408b7ebc05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133AC 19284 bytes
font_03_sfnt_off000164f9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x164F9 16792 bytes

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