Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f9b879749d3d89e…

MALICIOUS

PDF

85.0 KB Created: 2021-06-28 14:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 871cdc2175f7a137812dc78685c7ecc0 SHA-1: b7ce07aa9e300669ea12bdebc63f97a1b9e5af2a SHA-256: 5f9b879749d3d89ec6e8e668055b5b661c514d4961bb6052315e61931b46c98e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or trojan payload. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to lure users into downloading a secondary malicious file. The presence of multiple unknown URLs points to a distribution network for these payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c270ab92635---tubajelimabutuditibiji.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/af814c16dd898df77e4f604e6b9b848d/89566658688.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fa7a31ac8---63221512805.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1ad97e359---novalowiwexugudivab.pdf
    • http://beachfirebrands.com/userfiles/file/tijapi.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0a9273639---71809187423.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/tfkille3qka9o1ja4svo79j06c/65353457102.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072969ceef41---75821310011.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/0b101b0af447d0911ed7d7b8d83c0ff2/61044710131.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/5fbefc4452442b6727bd7e325d6970f3/64050421699.pdf
    • http://kusadasidentalclinic.com/img/userfiles/files/vijogigokamukirabun.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086f6dcdddfa---25274752714.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1609b774cde21b---lugamukozivuxobagovad.pdf
    • http://goref.ru/files/file/39238236004.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/a782c82c96174c058fdcdc0c07d819c6/24005838326.pdf
    • https://progin.swiss/ckfinder/userfiles/files/tefevadijega.pdf
    • http://yearbookplus.com/uploads/ckfinder/files/daluzabozulenova.pdf
    • http://nadiadsa.org/userfiles/file/vufaxolufolel.pdf
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/c56772d5e4bf61c090899575be00a0d0/wadutiwapefijagesokiro.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/bcea555a0fac9a872ce3e352bc3750f0/15534729208.pdf
    • http://gloexdr.com/wp-content/plugins/super-forms/uploads/php/files/41f8d2f1e9d6e0d8db89be3d5488702e/62853992048.pdf
    • https://sasalidayanisma.org/uploads/file/33357337104.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=bandage+in+hand
    • 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_off0000ee2d.bin
24c0bc3e68be60db0b336365b27e78ad09d8a056abf4e57a56f5e026e37fda88		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2D 10048 bytes
font_01_sfnt_off00010425.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10425 16792 bytes
font_02_sfnt_off00011c37.bin
550364f0132476b92bb45d03e67e3f55d67032c266002925c6b4990de8fa4f76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C37 16456 bytes

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