Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f2e8a1afde0c79e…

MALICIOUS

PDF

79.1 KB Created: 2021-05-22 18:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 146a85f0a95f115422815b6167941342 SHA-1: 77593894de7529054e62392511b1c1ada3506750 SHA-256: 5f2e8a1afde0c79e209f6a9148b9497c7caa2b531dbbb26698ea915379f8fc46
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URL that directs users to a site offering a 'textbook of therapeutic exercises pdf download'. This is a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the execution of a malicious script or payload via the embedded URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crysiq.ru/uplcv?utm_term=textbook+of+therapeutic+exercises+pdf+download
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5778a6f6b---42462338688.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/egspdikqrb933bukl1ncigdep3/radunisapodeziz.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/qtfbod0it2k8r8hp64dam5u8a2/pobidenuvupowotumedexiwug.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b26165f73---jekusis.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0f0a75370---37838277662.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/sdkgu1r55b8rcnuq6p06vib52s/22520356779.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/7cf4434a834397d6ce7c35f060f3b991/wodedosedadezimulik.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160965b6403836---59118876096.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/aa991df23f8ca2a1662ab34d9530b97f/tapatalirikanemovitosijo.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/48774e02036a3f85b935b8933fc4e747/34894763365.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f40341ae6---suxorejigosilofuri.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/fe80b7814ca2dd550d1f5e278a666e98/xawodimimaboso.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/umifsqjninor6sf9gtgc4k5nrh/xumurigumeja.pdf
    • http://aarogyamedico.com/userfiles/file/54486909973.pdf
    • http://timeyear-v.com/userfiles/file/12398551172.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/83eea96e7b3920049864d36f4b1401ed/kopepudin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e720.bin
da02b51e68ea54894edd0d34e10e42163a02875bf1ac29aee1f5ccc98abfd5be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE720 5440 bytes
font_01_sfnt_off0000f9a4.bin
375a55d109b689e65d9af5df5d546cfc650ab9e6cd07ad2764204ed9f8765afd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A4 11572 bytes
font_02_sfnt_off00011f23.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F23 4324 bytes

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