Malicious PDF — malware analysis report

Static analysis result for SHA-256 f695f912ebf9a9cf…

MALICIOUS

PDF

82.6 KB Created: 2021-06-25 12:34:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 025ededadb4d02d197450fc740c18051 SHA-1: bea55c8a67c2f19c5d0c3f24f0a7eb2632aeef8c SHA-256: f695f912ebf9a9cfd5d429d3dc2cb3b9d3bdfef9118badf466e80efe262f0ea2
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to compromised WordPress sites. These links are likely intended to redirect users to malicious content or downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a020dfe7ab7---ravomobilubirexopipisese.pdf
    • https://aduanaldelvalle.com/userfiles/file/rigebu.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a13b97f6a2---xinowo.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606faea8c10f6---54585958313.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608742b2bcf7a---49179498086.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/4664a72fd77c1f8d71c369ba233dcf49/95071395494.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/r5cnoech5pls6fkefhngsf01m7/65948722054.pdf
    • http://suarezbeltran.com/aym_images/files/8199949270.pdf
    • http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/94335920594.pdf
    • http://harasim.cz/uploaded/files/monagilokan.pdf
    • http://vom-ragnaroek.de/uploads/file/vojita.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf8fc3d84c---53765324035.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/f2a1b6f5876997888bc89dd99985a8ac/vitobosasisunonanuxas.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c642b79375---61206148650.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/3a0df10c0fd8898f1067eeed858ee2f4/ribitusifi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=persona+5+royal+chihaya+confidant
    • 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_off0000de1f.bin
cb61353d6f9408c5212ade8b62dabf142410a41582b1ddcc9ee9ae7b9cc1afac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1F 17188 bytes
font_01_sfnt_off00010b00.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B00 16792 bytes
font_02_sfnt_off00012317.bin
39b914cb894650a59f29d833bfc51e6dfb51cc42b677868b821968f39362e5a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12317 10824 bytes

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