Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a0b67490b7cb81…

MALICIOUS

PDF

81.7 KB Created: 2021-07-05 20:31:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5d92fe2f8ec6720e6e5a6f31cc0469c6 SHA-1: c25518586c4faadc3ab74988d32c4d77f602c0e3 SHA-256: 09a0b67490b7cb8116042c3f42d88fb1544df44cf951f4244f486b72cc083510
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing attempt. The presence of multiple embedded URLs suggests it is designed to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a common phishing lure, likely involving a malicious JavaScript payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=formula+for+volume+of+right+circular+cone
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/a9c05a6c62fe59c331b8a58a7ae3c09d/76121571689.pdf
    • http://sieuthivatlieuhoanthien.com/upload/files/34790363607.pdf
    • http://diamondsnspurs.com/clients/12200/File/badelixugulid.pdf
    • https://arrayamed.com/userfiles/file/dokagefobomur.pdf
    • https://exlite.it/ckfinder/userfiles/files/lijoke.pdf
    • http://a-swiss.com/upload/userfiles/file/42624532484.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f623780ce5---14048487034.pdf
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/takubozenajuj.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/tt849oif8nqqdvfoo6unfbfc7d/83976396776.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/91b13c1d2517f5098e8d833dba79583d/nurilokulexibis.pdf
    • http://circuitoinsulargc.com/documentos/file/lomogefezusedovigozozisu.pdf
    • https://thehideawayresortpattaya.com/userfiles/files/regijugate.pdf
    • http://thegioituigiay.net/uploads/files/giluvamemosamijopusojiraf.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/903cd269d982fc601af970eb989c9886/kojugi.pdf
    • http://acutecardio.ru/sadm_files/5967704388.pdf
    • http://yilip.net/userData/board/file/baximuguf.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b50683d4b00---lojojesisozaluk.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/6037b8ba3fa27e2832b31f68688df98a/25364533887.pdf
    • http://autoscuolecasetta.it/userfiles/files/73614704491.pdf
    • http://seyrimerdin.com/userfiles/file/35620947951.pdf
    • https://zemiigori.com/uploads/file/nijoxiwozizixap.pdf
    • https://soudurelausiere.ca/upload/editor/file/lesifutamelubezuga.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/t0uliaog2e7cph12ukh8350nb3/86834504132.pdf
    • http://piau-po21inn.com/CKEdit/upload/files/gujakefopisira.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b568940ce2e---nuregaxu.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a721c50e670---51694362541.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/c203d300909d89a10cc75c49b56ac89b/wulekosarunubawoguvo.pdf
    • 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_off0000d977.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD977 16792 bytes
font_01_sfnt_off0000f189.bin
21a4934a84f74a381fec1d6110e429741c50b40656c5c8a2cbbc333f791190ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF189 17792 bytes
font_02_sfnt_off000120a7.bin
761463a325f02fbd889f8f05227e2b5133e39590243ab31885a867225fbfef7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120A7 10760 bytes

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