Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4e67816a53a7c7…

MALICIOUS

PDF

75.9 KB Created: 2021-07-16 08:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6c53b998b223c3885e457f43d4590756 SHA-1: a4ba9a5ea439939cfd5859049849c132d5a7627f SHA-256: 9d4e67816a53a7c7bbf40c8852bf20e4b0ffac68993235bc48722e3ac2638599
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and also by an ML classifier, indicating malicious intent. The presence of embedded URLs, though many are marked benign, suggests a potential lure for users to access external content. The file's structure and heuristic firings point towards a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7056

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/rCno-htTzZk/square?utm_term=present+perfect+explanation+and+exercises+pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed008b4616123fc5f5cd42/1626144907900/alachua_county_docket_search.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e924862210ba6bce1247c7/1625891974627/minecraft_download_pe_android.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edd642b0089c62dc3d5fbe/1626199618220/charbroiler_near_me.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec7a0220781e4bb11ae563/1626110466536/17349372934.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_off0000c9b7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B7 16792 bytes
font_01_sfnt_off0000e1c9.bin
cb22044b30cc459f84a7ffff28b9360a2f8bf730f6bf7191a301bca9fa0b323e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C9 16004 bytes
font_02_sfnt_off00010b00.bin
407fcf3bf1a1bc46e7510cef17e55e267d4523f2fb4a65c9798625244e269344		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B00 10716 bytes

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