Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d38ba257cf330aa…

MALICIOUS

PDF

101.0 KB Created: 2021-07-13 06:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7410fd2a82517fe7201e44d49e516ff2 SHA-1: 0120d13552fcdeedd1124aa6107cb889995c3f5b SHA-256: 6d38ba257cf330aad97426e642ce2efa8229f6a9fed036ae5048aa47830873bb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. The presence of embedded URLs, even if some are confirmed benign, suggests an attempt to lure the user to malicious content. The ML classifier also indicated a high probability of maliciousness. No scripts were extracted, but the overall structure and detection indicate a phishing or trojan delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5877

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://feedproxy.google.com/~r/sq/ugae/~3/iXsW93xxTQA/square?utm_term=what+does+imo+mean+in+a+text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60eceea13489b768f16a5ae7/1626140321631/vedazisadol.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eced908c96c6301f8e28b2/1626140048593/reverse_all_words_in_a_string.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e814b1efb14d112213b4cc/1625822385204/gate_chemical_engineering_2020_solutions.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_off00012a2d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2D 16792 bytes
font_01_sfnt_off0001423f.bin
f6d091ebb2b9986008d5bfece84905e39f475f0a7d8c36844471d70d6aab8093		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1423F 17820 bytes
font_02_sfnt_off000170d3.bin
e53d29ea1486b9d81c69d56861f81c1c57fd64e8b1b392dc757bd4f412e2c56a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x170D3 10464 bytes

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