Malicious PDF — malware analysis report

Static analysis result for SHA-256 080dffe0d96b7a29…

MALICIOUS

PDF

91.3 KB Created: 2021-07-21 10:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d29ee8c941f724e5d59202267298a100 SHA-1: 904c6488726c18e626daf0d397f960c4abdda1ad SHA-256: 080dffe0d96b7a291f7ef26f6733484144477d9cf20e21506cc4f8934a433331
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate this file is likely part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://zwickerfoto.hu/_user/file/gefet.pdf In PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/m6di00btb6e6s0rbtgo82lvvvl/xerujanitirum.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/ba3ef1e6720b5af438465f57de57bbd9/baxerifenedodadofixi.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/8911042771.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/355881844.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/8042871245b2d92a8ee0e0c41568fa03/68168166416.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/31031135f6761b73ff63235e8ebf29ce/56544099280.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c039a4aa7---52187410543.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/d07e59bd58265a930d1757f81ebdea3b/petomuxesijorudivanup.pdfIn PDF document text
    • http://cezanart.com/userfiles/file/dudiwuvinudexefibumawowiz.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/161c0a10150b9a8f20b66a7c87e6f64e/57347920697.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/14368304596.pdfIn PDF document text
    • https://www.tahitotfaluovodak.hu/ckfinder/userfiles/files/gadafuxuzusaz.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd182cd57db---tuvufofisimor.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/93438023761.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/sitonoxaweduwoliveb.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/74655235276.pdfIn PDF document text
    • http://portaldo.eu/contenuti/upload/file/lonozutorebudurekepok.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/e3b4310ba75453a702d55408fe388eb8/jivenesagap.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf0674cace---90864828831.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2dd9748f8---39317959373.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160dda5c305710---wowan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=cold+face+emoji+copy+and+pastePDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1A 20408 bytes
SHA-256: a0c28567bcb06110eb7d33d12cad1b8cb990788e015905ba212d7e4e7236565b
font_01_sfnt_off0000e9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000101f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F3 22448 bytes
SHA-256: 591fff225f5ce53fa55eb79f8facdf47d2a8ea31a5a3ded31f79edbde5a865df
font_03_sfnt_off00013a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A62 10956 bytes
SHA-256: 0d66694ea8686dfe842db0e6b338477eb57068bd2c95199e7c54474469dbffc7
font_04_sfnt_off000153c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153C9 2156 bytes
SHA-256: 2a55edf84217b0bbbcc09235bcd7030b55ccfa7ca66eeb582384a000a92623b4

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