Malicious PDF — malware analysis report

Static analysis result for SHA-256 769199bdb8900033…

MALICIOUS

PDF

86.0 KB Created: 2021-06-25 22:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 452270e8d5a6a97dfb01f6f054ede748 SHA-1: 6aaf0756f18be4924bc535ff152640be3d766cf7 SHA-256: 769199bdb8900033e7fbb749a95588b70eb189d88ef1ac2a75868a95937ef485
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links to compromised websites, indicating it functions as a link farm to distribute phishing content or further malware. The presence of these links and the overall detection profile strongly suggest a malicious intent, likely related to phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://wastran.ru/uplcv?utm_term=draw+the+free+body+diagram+for+the+following+problems
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608161a2b186a---kerupumu.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f54178321d---bowedodefimowedexaxigamo.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16085f3d4a3f11---32979175314.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b92d25ebb64---75557567314.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/9a8f325dc6d4ff48b2772ddcb2db2973/44342724742.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/2711d2cf5ad1ae1cd5b46008fc96862f/46672659848.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f2f7d469d---51765177070.pdf
    • http://lezeckastenakosice.sk/upload/files/zoxenadirageponusebanoxub.pdf
    • http://crediramasrl.it/public/file/dinuxudimipuw.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609abd6b6f4e9---26607968443.pdf
    • http://accessiblevehicleservices.com/userfiles/file/ranijegowomukuzalukuzader.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b61b9826dc---vitakoraponaroda.pdf
    • http://www.heksan.com.pl/file/gawagen.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854a3cc6e48---gudamidegiwigawil.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9fcac5ba8---43385550572.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f67f2e5e6a---romagudime.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c06eeba76c---miworuvodudavab.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c1eb62a85---63148957784.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdfcb6c6f8---rubaboxijewibodaxixem.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/0cf620b29ef15ece1078e5703d645cba/26017374639.pdf
    • https://subarini.ro/mm/file/72372576931.pdf
    • https://akapacha.com/userfiles/file/mowurewemojetelefuduri.pdf
    • http://fittbike.hu/files/file/22745070769.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_off0000ec8f.bin
17089da8ea7bce2c2fce23e4a7112363af9160b7837cf9d451a3e2f610b0b30a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8F 11284 bytes
font_01_sfnt_off00010679.bin
1a57cb8e8db0c896fe23ec3a110f7e2e6fe6600d6d4ca7a6e1cada178dae8aca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10679 16700 bytes
font_02_sfnt_off00013230.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13230 16792 bytes

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