Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c921d48614bcec…

MALICIOUS

PDF

76.9 KB Created: 2021-03-29 05:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00c8134a3279f70ec0c7d701e2c73ac1 SHA-1: 70824c47eb1c020831b7b25763ece0fb9c3faf3a SHA-256: 27c921d48614bcec89a47ff67804dc40b9d9ffbc12f2fa91af72bcec8466d534
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that leads to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to sheet music. The presence of embedded URLs and the overall detection by security tools indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/award?keyword=pathetique+2nd+movement+sheet+music+pdf
    • https://cdn-cms.f-static.net/uploads/4447447/normal_5fd1914467f3d.pdf
    • https://cdn-cms.f-static.net/uploads/4484107/normal_603badd68a970.pdf
    • https://cdn.sqhk.co/fesakesovoka/MjjjjJP/telepathy_definition_in_communication.pdf
    • https://cdn.sqhk.co/xoxujagemo/eIRAjhc/nupopubawimaworapikawu.pdf
    • https://static.s123-cdn-static.com/uploads/4369174/normal_6006a3d8b04f6.pdf
    • https://xorizugabe.weebly.com/uploads/1/3/1/3/131398100/7104aae6dc.pdf
    • https://cdn.sqhk.co/dusujukakal/iGJr81H/33197481380.pdf
    • https://famereruzune.weebly.com/uploads/1/3/1/6/131637342/a6fc11cce.pdf
    • https://lexizade.weebly.com/uploads/1/3/4/3/134368494/katamutavo-kadufap-kakubapoxara.pdf
    • https://static.s123-cdn-static.com/uploads/4489586/normal_5fe14e677f6d9.pdf
    • https://cdn.sqhk.co/nasanoroge/9f1OvbG/background_eraser_canva.pdf
    • http://lumurezekosarew.66ghz.com/kivoj.pdf
    • https://static.s123-cdn-static.com/uploads/4426957/normal_5fcf33d518513.pdf
    • http://kuzamejeluwezik.22web.org/gimorajozulijugipebemubun.pdf
    • https://cdn-cms.f-static.net/uploads/4489717/normal_603cffe9ba6d3.pdf
    • https://cdn.sqhk.co/kenixidoxexi/jxjhhwC/wizatizatekekonamat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zinipaxafuzonik.rf.gd/pci_serial_port_driver_dell_optiplex_755.pdf
    • http://tosaxope.rf.gd/fujakojokifo.pdf
    • http://wixufoliwesomep.epizy.com/19861144701.pdf
    • http://zapivevo.epizy.com/kesoguronedinofujipurufa.pdf
    • http://zekakodususebu.epizy.com/the_sixth_sense_movie_in_tamilrockers.pdf
    • http://tewidunutazi.rf.gd/22661889795.pdf
    • http://tukuponuvul.epizy.com/cbt_exam_full_form_in_railway.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea6e.bin
bca1b80d478939ea3c976b321987b7a570c26dab9cb91c8b05f29e4fdf0c50e2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6E 5584 bytes
font_01_sfnt_off0000fd59.bin
3607870f4a5092e36723e5133086c31c3c178f8cbf7a875705a7dc6f5ac93d65
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD59 12468 bytes