Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf2c8cb20e2f9d48…

MALICIOUS

PDF

98.6 KB Created: 2021-06-30 04:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6a63933ff659787cb89ae676a2faf94f SHA-1: 0438aaef479bbc1c54c9b0682f294d7377370458 SHA-256: cf2c8cb20e2f9d4846fb41047921c206cea69dd64cbca38e487f8935473d7d4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. These URLs are structured as a link farm, likely intended to lure users into clicking them. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/ee565736c2e2d68de2d070c6e3520ef7/6213883708.pdf In PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce26530c54---sejidimonezul.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/zefenobi.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/215551fad702435ad6ecda83dc13b40c/22684668821.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/j9pk4kgeevm6u1lb1bunv7o3bp/98609222901.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823ece05ab7---vozolaxa.pdfIn PDF document text
    • http://skylineidaho69.com/clients/c/c7/c7306e0a9cc1d421caefa9c307ca601f/File/11335969178.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/24425813555.pdfIn PDF document text
    • http://brlairport.com/images/file/56422108648.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16090b9aa833c8---wuguperibifegoje.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/hqf7v8sls2ii5pt3m4jqeh9ei7/jolututijixo.pdfIn PDF document text
    • http://cuuhoatudong.com/upload/files/39275265002.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761f0204db0---18888894982.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a54f5eca19---89129420665.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/nenuwogogolesisonana.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/77944269613.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/osne3rriffrmdb36ekr9v7gqsf/fexalobovifovo.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/81700080423.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3f5b38f6c---tuwimedigawomejibavumimil.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074585805b34---kudavabazugevakibe.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/40469600314.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609d15b85eaf0---95760962465.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c1cf0346e---banolid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=shares+journal+entries+pdfPDF link annotation
    • 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_off00011c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000134aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134AA 18224 bytes
SHA-256: 3ab696d96f23fdec0900f1db4d03d97203f1ef3ee784768a159a90516859bc7d
font_02_sfnt_off0001642f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1642F 10900 bytes
SHA-256: c36661999d3976c334d3dcf5082476cd20af1c913fe992aed04da31740b65319

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