Malicious PDF — malware analysis report

Static analysis result for SHA-256 01cc237592e63b55…

MALICIOUS

PDF

92.1 KB Created: 2021-09-11 02:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9e7fec2fde1cca85dc45be0e89438d02 SHA-1: 9af7e0970cbe6a68c47dd45df467ef9c2444e7ca SHA-256: 01cc237592e63b550ee6f60745a3add3f65404571fdb30d6a552b62ac880c362
176 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The 'SE_CALLBACK_LURE' heuristic indicates the document may prompt users to call a phone number, a common tactic in tech-support scams or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 7

  • 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.
  • 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.
  • 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://smidgel.ru/uplcv?utm_term=full+hd+movie+war PDF link annotation
    • https://cakesandcupcakes.net/userfiles/files/nuvufanotonebomo.pdfIn PDF document text
    • http://www.eau-msu.ru/ckfinder/userfiles/files/47776137148.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/fuwivuwagiguvuxi.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/2641920424.pdfIn PDF document text
    • http://costruzionibulagna.it/userfiles/files/tejowabovotuseditejebu.pdfIn PDF document text
    • http://skmsm.com/userData/board/file/12512268773.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/40269531720.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/3784c8aba2e50fc165ce96d90fdf77c9/83678356991.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/files/22585883973.pdfIn PDF document text
    • http://jpsacademy.com/slbdavbatala/userfiles/file/jepenedumaposaki.pdfIn PDF document text
    • http://taixingchem.com/uploadfile/file/20210909192621345.pdfIn PDF document text
    • https://medicabg.com/uploads/wysiwyg/files/podarulojeb.pdfIn PDF document text
    • http://isystem.hu/userfiles/file/78150324726.pdfIn PDF document text
    • http://www.520amis.com/upload/files/76258919632.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/35165934376.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/naritexubir.pdfIn PDF document text
    • https://aymexco.eu/ckfinder/userfiles/files/zexilijarokoxuperijag.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///86656245697.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f55dc77c13---87503493521.pdfIn PDF document text
    • http://qdjshg.com/files/file/loseriwixijex.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/27435172584.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613568be96131---zukutufef.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/wevixasetezapedav.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/725ef7b3fd6262bbd0bd42d4c1556337/56395906579.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/161324e07a42d5---12208237577.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/nurodidiguxajuburovinamon.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A4 10372 bytes
SHA-256: 1e2103899c1874fc3d8c2d8d3407fac0cd4b2dd599998562c694da5022447225
font_01_sfnt_off00011e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001361e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1361E 17228 bytes
SHA-256: 11975f4f5efec4769e10c51278320eb3cdce092cdcb8522d6a4a2e232cc9e1f7

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