Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce37b17519202f5e…

MALICIOUS

PDF

74.3 KB Created: 2021-03-29 13:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40bbbd1ce60ff0a8e68c6219460f9024 SHA-1: e9635b7ee7aa72731cacf5450c65be94ed89f922 SHA-256: ce37b17519202f5e5576ebb2ed06af42168f2660dc6feb29985ea4e0b9020d55
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'vilenefex.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious 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://vilenefex.ru/wix?keyword=fort+jackson+to+fort+lee+directions
    • https://cdn-cms.f-static.net/uploads/4368249/normal_604c9cda34291.pdf
    • https://cdn-cms.f-static.net/uploads/4382189/normal_6047f41067a4e.pdf
    • https://static.s123-cdn-static.com/uploads/4455399/normal_5fc9a73b47f57.pdf
    • https://budamasut.weebly.com/uploads/1/3/4/9/134903336/3989092.pdf
    • https://cdn.sqhk.co/kopilixa/fyZijqI/xonidolameverudi.pdf
    • https://nazumuliwoj.weebly.com/uploads/1/3/1/3/131383416/5381400.pdf
    • https://cdn.sqhk.co/wimedizi/eSbjejj/30488345822.pdf
    • https://cdn.sqhk.co/doxelatofon/ogfidai/95378250547.pdf
    • https://nemabofafuz.weebly.com/uploads/1/3/5/3/135389169/ribevekusagex-jodopibirixu-tijavosu.pdf
    • https://cdn-cms.f-static.net/uploads/4375095/normal_602b3b199acbc.pdf
    • https://static.s123-cdn-static.com/uploads/4443815/normal_5fee0b03e0292.pdf
    • https://cdn.sqhk.co/bexuxoxabim/UbRDiad/bikadibodoxivowuv.pdf
    • https://cdn.sqhk.co/zipodumup/ijgcl95/bazigar_o_bazigar_remix_song.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bf3623be-7b0e-4115-a55e-160522e5e319/zojema.pdf
    • https://s3.amazonaws.com/zoluwivebiro/22439876961.pdf
    • https://s3.amazonaws.com/silubebebefuju/mahatma_gandhi_short_biography_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/dd4977e8-d5ff-436a-868b-700cee92e727/88210518532.pdf
    • https://uploads.strikinglycdn.com/files/1e280771-2bd0-43d8-b28a-0568abe4f1ad/jusuvadafewitepali.pdf
    • https://s3.amazonaws.com/kimone/putting_together_a_sole_f80_treadmill.pdf
    • https://s3.amazonaws.com/fulosobezur/zolopa.pdf
    • https://s3.amazonaws.com/bepukuba/40299408075.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_off0000e633.bin
5df1894669191d4a045ebfb310d88281dbbaecca25e1fc62704a23d743b2a02f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE633 5108 bytes
font_01_sfnt_off0000f7ac.bin
010c72604cb062e4082dc2ea6b07e25fe445a52b84ca854d5a216f742ac92855
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AC 10568 bytes