Malicious PDF — malware analysis report

Static analysis result for SHA-256 d061c0fa8df5ff38…

MALICIOUS

PDF

89.5 KB Created: 2021-04-05 12:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b4568e1c710c2a6ebbf025c371876a5 SHA-1: 924389ae5ae69d8325f33cf8127fdda2323d64cf SHA-256: d061c0fa8df5ff38cc751ff8993531f9c9aa870bbf70ca254ea8b5b7f5af9171
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically indicating phishing and Trojan activity. It contains an embedded URL pointing to a domain that appears to be involved in distributing malicious content, disguised as a job promotion letter. No scripts were extracted, but the presence of malicious URLs and the nature of the heuristics suggest a phishing attempt to redirect users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/award?keyword=job+promotion+letter+sample+pdf
    • http://irisca.online/where_to_get_p90x_for_free15qeg.pdf
    • https://static.s123-cdn-static.com/uploads/4420587/normal_5fc6a9d3be3c3.pdf
    • https://cdn-cms.f-static.net/uploads/4460042/normal_603d49db4f690.pdf
    • https://static.s123-cdn-static.com/uploads/4497353/normal_5fe26b5a449e4.pdf
    • https://cdn-cms.f-static.net/uploads/4463308/normal_600eaa0ace27f.pdf
    • http://termometr-medikal.site/889375723210cbep.pdf
    • http://opensalon.xyz/what_is_the_moral_of_the_story5kffl.pdf
    • https://cdn-cms.f-static.net/uploads/4403404/normal_600f280e55a43.pdf
    • http://iminn.ru/guardar_fotos_de_whatsapp_en_galeria_androidjhc6i.pdf
    • https://cdn-cms.f-static.net/uploads/4407986/normal_600d94d48ccf0.pdf
    • http://ipai.online/nofilunowobudol7n271.pdf
    • https://cdn-cms.f-static.net/uploads/4422631/normal_6057f9d31e69b.pdf
    • https://cdn-cms.f-static.net/uploads/4460975/normal_5fe74d80a564e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/titugome/gpsmap_60cx_maps_free.pdf
    • https://uploads.strikinglycdn.com/files/86d099cc-4cd8-4104-bb6b-511ec8dab8f8/1609590590.pdf
    • https://s3.amazonaws.com/bepukuba/topolulegeraserukul.pdf
    • https://uploads.strikinglycdn.com/files/1b23bd97-15e4-4836-b747-489026cf9661/gas_pipe_line_installation_near_me.pdf
    • https://s3.amazonaws.com/zoromexemuzid/tisapaze.pdf
    • https://s3.amazonaws.com/boxujetanonikuv/dikulafobupanib.pdf
    • https://s3.amazonaws.com/fulosobezur/eclipse_to_intellij_cheat_sheet.pdf
    • https://s3.amazonaws.com/sabobenuwe/bulovizusibivujidares.pdf
    • https://s3.amazonaws.com/wozowuledij/super_pose_book_vk.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_off00011ebe.bin
3c35ff711b7c1049c858b2cd1d9f440446af7d17e58c55c1f436d22d69a42608
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBE 5316 bytes
font_01_sfnt_off000130b3.bin
7b49aad4d8bae8e133c2da2532f07bf165031611ecfa61ebd4d5481d416c0cc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x130B3 11376 bytes