Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde4d6ad9122816b…

MALICIOUS

PDF

88.3 KB Created: 2021-03-08 10:42:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 769795217d0c3cc40c6e3f6009115228 SHA-1: 287f740d835c1901b3a273b80ca646dc5df39769 SHA-256: dde4d6ad9122816bb94fb6c63790d6b1068f9c925f45de9196858fca20789402
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classification and ClamAV, with heuristics indicating it's a PDF containing an advance-fee scam lure. The document body, though heavily corrupted, suggests a context related to a 'manual de supervivencia urbana pdf ferfal' and mentions 'wkhtmltopdf', indicating it was likely generated by a tool. The presence of external URIs, particularly the one pointing to 'ponafet.ru', suggests a potential command and control or payload delivery mechanism associated with the scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://ponafet.ru/strik?utm_term=manual+de+supervivencia+urbana+pdf+ferfal
    • http://itchia.space/45223314753c0mau.pdf
    • http://aycotoro5.xyz/fugudufifpjlo1.pdf
    • http://znalomstvavip.site/csc_x_integraljbqeo.pdf
    • http://ratubave.22web.org/givunaxofakololirijunopol.pdf
    • http://verification-help.com/network_security_baselinecle55.pdf
    • http://prosucre.pro/ride_the_tiger_julius_evolaqbmuo.pdf
    • http://help-verifiedbadgecenter.com/833890858280vc66.pdf
    • http://feyakast.online/what_order_should_you_read_the_rick_riordan_booksgs407.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zolerazowubow/two_step_inequalities_word_problems_worksheet.pdf
    • https://s3.amazonaws.com/fukezavazuj/57721480488.pdf
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_02adf89d98eb42a7a5c06834d2581f9c.pdf?index=true
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_eb69ae7cde8a47c9abf3f66a4ed2ec80.pdf?index=true
    • http://lagefow.epizy.com/health_the_basics_13th_edition_pearson.pdf
    • https://uploads.strikinglycdn.com/files/ca5c90da-e8d7-452a-86f3-ca03a834b979/37317459692.pdf
    • https://s3.amazonaws.com/lovetijif/cracking_the_pm_interview.pdf
    • https://uploads.strikinglycdn.com/files/49da4b14-a76b-4271-94c4-6beec77ea063/pedoxewujuz.pdf
    • https://uploads.strikinglycdn.com/files/47da5a33-387e-4fb3-8000-9112ffbe5d41/93231325921.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_off00011afb.bin
abe020f2aafe79a5bc8154512aec6baaaffee3d02e5b1399d65f715f22faa3c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFB 5356 bytes
font_01_sfnt_off00012d51.bin
6918cde75fc301f86bfa1c5264fb851eae8bafec24590643c6147788108587b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D51 11648 bytes

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