Malicious PDF — malware analysis report

Static analysis result for SHA-256 b52dbf43ef133305…

MALICIOUS

PDF

68.7 KB Created: 2021-07-18 12:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1a9bb4d26e18e75bb39329ce8a931c66 SHA-1: 8e86d393a037af906fa862ffea92224a06737ada SHA-256: b52dbf43ef133305a758ce409f69d2d3fad3b6b8de11cdcac2ca26ba4127a287
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site or download further malware. Although the document body is heavily obfuscated, the overall indicators point to a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8216

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/r_nBws6J8g8/square?utm_term=writing+dnd+campaign
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eca8f9c81c37306b325a99/1626122489863/kuwerifevexobizenukofiv.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7d410fdc75e32ab072afc/1625805840809/zotamujusifuguboti.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f38e91b84a576e6c03315b/1626574481914/moving_out_of_a_rental_property.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60efe842b3de5a36b125a93a/1626335298700/50023759528.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0cf6ae013e242e70f235e/1626394474464/what_to_grow_with_corn.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_off0000b4c7.bin
8dccf293d72eaa7562a2521e0bfa53d9999655af03697e2745d7241b4e972c1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C7 10384 bytes
font_01_sfnt_off0000cbff.bin
785e0300b7e2fcfa553ed3ef5eaa91c31800b10f0b46b89d6324e01c9149e9cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFF 14052 bytes
font_02_sfnt_off0000ef18.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF18 16792 bytes

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