Malicious PDF — malware analysis report

Static analysis result for SHA-256 041ba058af06942e…

MALICIOUS

PDF

81.4 KB Created: 2021-07-17 03:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9751d94bdd7fc89e7c56865e4c77dc75 SHA-1: d9613aa6403aab7699f7b33d76d6e10c3e25ae68 SHA-256: 041ba058af06942e37caaabaf16bf2f2486af1a235bcbc91e1789fe90dd687b1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains embedded URLs that point to external resources, one of which is a Google feedproxy URL. While the document body is heavily obfuscated, the presence of embedded URLs and the ClamAV detection suggest a phishing or credential harvesting attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6221

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/gOBB6uaVNRA/square?utm_term=when+does+a+cat+mature
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee136a9c71001bedf291d2/1626215274432/step_by_step_tattooing_for_beginners.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ede7e0017ec663b53d5f13/1626204128352/xolonikinogujoluvagivetuf.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8e799e51f1f218d67226f/1625876377346/sore_muscles_in_chest_and_back.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_off0000df3b.bin
9694a1a7fe0c4a3411a456d0b77de57fcd49e4692108b39c4ec8885963673bef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3B 10588 bytes
font_01_sfnt_off0000f748.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF748 16792 bytes
font_02_sfnt_off00010f5a.bin
f51dfc81533850bf6c8bf7b701033af0df7430c0bc4b3dc9a54e333c563c113c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5A 16508 bytes

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