Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffc8173658e8fd0…

MALICIOUS

PDF

73.2 KB Created: 2021-09-01 13:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5800c4168842ea8536efac58ea30cb1b SHA-1: a75ad0770adc0a35e2057db275a60e57c7c5179f SHA-256: 0ffc8173658e8fd0e00adc7a62f2d998f8eea295f72ab4ced87873da7db207ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://philabc.ru/uplcv?utm_term=camshaft+position+timing+over+advanced+bank+2 PDF link annotation
    • http://erpos.sk/data/files/pagolusidekigixiveligamef.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/pabizevunefomerev.pdfIn PDF document text
    • http://tweddlefoto.com/files_contenidos/upload/files/93810167421.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/f2008e8b532fccbc867c31f45d0e25b4/79318755489.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e15c64589---petabemitexenazivibujozek.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160984917ba6f2---zidutibijunifilevagibojig.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021071304302280554.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/xejisenulugegoti.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/pifojegerodejuxokufukes.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/67750532839.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160860256b7313---90132908874.pdfIn PDF document text
    • https://euro-m.si/web/dokumenti/file/29037659414.pdfIn PDF document text
    • http://huntland.hu/upload/file/kazuziridanazaxobi.pdfIn PDF document text
    • http://tfforming.ru/d/files/bilekomogesubukigini.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/63630895072.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/172d73a0179fcfb31a1a7f2859e577ea/sumegamofotetomunizuv.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/c535a1d2be1ee2022b560f5515c9942a/89120743172.pdfIn PDF document text
    • http://kalikraft.com/images/file/33681485840.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/d4ed735448fcbd375ffc826eae64bb06/54987277900.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/serupelojimanal.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/26095575350.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/98665dfef2e648f2f1ed388d31039f23/864290631.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/judopumisox.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/jovuriruxo.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860faf213dd---87446554417.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_off0000bc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC9F 11472 bytes
SHA-256: b6e251680c460faf220baf4289db153f2b1a6e20e5d16e327013d685d8c228a2
font_01_sfnt_off0000d739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD739 15516 bytes
SHA-256: 5ecf84e21e5d6586f3e416268c5060b52e4734ccc54dc62b3789190cf29e0979
font_02_sfnt_off0000feee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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