Malicious PDF — malware analysis report

Static analysis result for SHA-256 767f136733976d90…

MALICIOUS

PDF

91.8 KB Created: 2021-06-29 14:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e6fc0930ded8759df231aafbbecd116 SHA-1: 22143b0c83aba9177704e47c501cabc0e30c13e6 SHA-256: 767f136733976d908c75dbaea65d08639d43a6d3b57c56f10b3b25ae5ca70693
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, one of which points to a suspicious PDF file hosted on yjccnc.com. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://yjccnc.com/upload/files/4932737957.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/121dea8a800227459c2d09d8557d1b45/30304263153.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16093e7e906df4---tinagibodiziworekibibof.pdf
    • http://modnyi-buket.ru/uploads/files/barosodotosune.pdf
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/sisijivajepis.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/8ed04b7593074430be26fbf950371812/migudobaguzavinimezixewux.pdf
    • http://self119.net/upload/userfiles/2021/06/files/210618034334.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/4afc82d677a7c799b4a8538aee346cb9/69873494563.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb5fc43172---65761654103.pdf
    • http://centurionim.com/userfile/batiment/file/tekunoxifobuvugo.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160823235a9ba9---rolobexi.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/15abimnapi9f8cpvua2gg5ehcp/molikebatilusemiwu.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c8425c5d7---waluje.pdf
    • http://blackivy.pl/userfiles/file/lopupe.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160994551a2527---kusixapetowoxatinu.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/7978290eb7b994436d7814daeb752cc8/dowigakuvesola.pdf
    • http://iphysiology.ru/upload/xiduxafimasazagofolukopu.pdf
    • http://sterkrade.net/ckfinder/userfiles/files/jijinejagulonoxudubo.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/864dbf58371fd0875497d12e2059abd7/50234592638.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/187bd3e53703492c24c849d304b41608/11821228847.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b867e72d173---letijik.pdf
    • https://aslimitada.com/userfiles/file/gexev.pdf
    • http://www.sec-ollivier-associes.fr/www/upload/file/41521570205.pdf
    • http://novichiha.ru/pic/file/takitijoxeseweviwi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=what+do+pixie+frogs+eat
    • 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_off00010374.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10374 16792 bytes
font_01_sfnt_off00011b8b.bin
9124b043b163347f2d00f8c3eb53d6aa3b225781a32afdc822f3724d613e73ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8B 10724 bytes
font_02_sfnt_off00013426.bin
8d46d7fc0fc2cf33316bcfd436a22c64ef01c4d559ac4e84b1323214be7c04d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13426 17004 bytes

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