Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf1c2d3cc5d9f000…

MALICIOUS

PDF

87.7 KB Created: 2021-07-05 02:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3643c2bd906c0ec9672a4995540f28c3 SHA-1: 5b14d766a2067b4111ebce2257421c33e442eb90 SHA-256: cf1c2d3cc5d9f00090cc96845e64ce2def11e81d7087312b4bd1d1b552e9baeb
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, many of which are hosted on disposable domains or utilize common CMS vulnerabilities for file uploads. ClamAV and ML classifiers strongly indicate malicious intent, specifically classifying it as a phishing trojan. The presence of multiple external URIs and link farms suggests an attempt to redirect users to malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://archism.ru/uplcv?utm_term=science+and+technology+studies+field+of+study
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/91a94c374293c3c26f993147dae72dd9/42218918418.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16080f1c52293a---nilazul.pdf
    • http://banphimchuot.com/userfiles/file/90804953257.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608667fba36ee---31301678833.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c33b3d0e496---34881682178.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/oo86tllflcm4pevn81742gh7rr/39979749032.pdf
    • https://parokisantolukas.org/Uploads/userfiles/files/792230413.pdf
    • http://adamlegal.com/userfiles/file/sapowumopomoruxizip.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/36e835062f02a5cf4a3cee3f36f285d2/nutopalafe.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607145421eaff---wavafu.pdf
    • https://menu2uplus.com/images/file/bexif.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607698ac20386---bafejulow.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607215bbb2c0b---fejojama.pdf
    • http://beerskiboot.de/img/upload/file/94179546490.pdf
    • http://manixcnc.com/ckupload/files/rukupobomutexasa.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/nihp5iltuh2t67ne8vfopm90cg/dunanavijunige.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/53644239e993478498a17cb002a43878/fobowemovurulaje.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/9b8afe337189467ed59cf95eabaf3ffe/xorexogazivijeve.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/suaha03emgcuhrrk8kervg4atb/95998213185.pdf
    • http://kfbi.ru/content/file/91482722122.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/712f8dbedac66f0c0799d1bc055a91a0/530047732.pdf
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42020070346.pdf
    • https://burstallconrad.com/editor_files/file/tifezimelotadukut.pdf
    • https://etonbio.com/newsLetters/images/file/kalewugimixuvusiva.pdf
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/84257689af83a42aeaa9352d76fc49dc/31944520783.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_off0000f16e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF16E 16792 bytes
font_01_sfnt_off00010980.bin
8488d1ee6394abaa3d875d961fc275bbe16d6684627ae3626bc386eca376410d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10980 17776 bytes
font_02_sfnt_off0001380d.bin
1cfbe1bd2b776b149e7a051a094a71b70e121ac57e358c4e589ddc874a980115		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1380D 10944 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.