Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b2b40af539f5ea9…

MALICIOUS

PDF

174.7 KB Created: 2021-07-17 19:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 628f3b148c71dc4c11f91a447f62a653 SHA-1: 3212bf07e93c564370b5ed279b1a317a49a61df9 SHA-256: 9b2b40af539f5ea9cb2a0b09510de4f5de0358fe5412154d81183de835e315f6
106 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ClamAV, specifically as Pdf.Phishing.Trojan. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's content is designed to deceive users with a fake lottery or parcel delivery scam. While several URLs were extracted, they are all confirmed as benign, suggesting they are likely decoys or unrelated to the core malicious functionality. No scripts were extracted, and the document body was unreadable, but the combination of the ClamAV detection and the advance-fee scam lure points to a phishing attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4570

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://feedproxy.google.com/~r/sq/ugae/~3/iXsW93xxTQA/square?utm_term=who+was+the+first+person+to+discover+the+existence+of+pichu
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8890700aa07a78956a7b/1626114192609/king_edward_of_wessex.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f16c775554232196bf7e44/1626434679816/95575845892.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f12a5e1c98e64adee88a2f/1626417758319/mefaferudagera.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60eff485d9659e2786458600/1626338437896/clash_of_clans_base_builder_th4.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e81e7780504e0a776c67b5/1625824887753/jilonegerikaxubuxu.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e77b908a1e29062001e7d3/1625783184636/21452277692.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://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_off00024d8e.bin
d55f332cb3ffb3b3f50feea1761157b61a95fd49b6b3a3dae6cc0dbfef582665
pdf-font-stream PDF embedded font (sfnt) at offset 0x24D8E 17952 bytes
font_01_sfnt_off00027c2a.bin
64a2e1dbb41960263596f9323dc351ccdf89764638ce19f7db13e7a16e09f48c
pdf-font-stream PDF embedded font (sfnt) at offset 0x27C2A 11020 bytes
font_02_sfnt_off000295de.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x295DE 16792 bytes