Malicious PDF — malware analysis report

Static analysis result for SHA-256 15204b7b4e57054f…

MALICIOUS

PDF

86.3 KB Created: 2021-07-17 06:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c5489a18314a12c30be82ceef3a4c753 SHA-1: 44304e638b8905c99b4217621a3a8e8adb44c26d SHA-256: 15204b7b4e57054f4dc5cce96b6d3301026c8dcd76f35cc7c91b8d8dc6ae7a3a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. The PDF contains embedded URLs that likely lead to malicious content or further infection vectors. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit vulnerabilities or trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8083

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/IdU8rIDf9lQ/square?utm_term=name+of+complainant
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f215a77f94c710fbb83c6b/1626477992015/sultan_tamil_dubbed_full_movie_download.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8b97d6f0e2d629ebed194/1625864573523/rirosifaniwajuzujubir.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edaffdc5e0b1320e362510/1626189822026/herpes_zoster_in_pregnancy_treatment.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec9c60def1ca41d5fb8216/1626119264469/dua_for_sharp_mind_and_memory.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e903ce58c6623f0380ffaf/1625883598838/little_fires_about.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_off0000effe.bin
19c6654657879fe5e1223328a2ceee1d9d0cd37156cdf0765455e08834d7a849		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFE 10352 bytes
font_01_sfnt_off0001074c.bin
9cf7fc1ce0ce0cc7adc56a8dbf19b635039e4275ba639f59a443367542ae3afb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1074C 17612 bytes
font_02_sfnt_off000135bb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135BB 16792 bytes

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