Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d13443212b7fc41…

MALICIOUS

PDF

76.3 KB Created: 2021-07-12 20:38:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 415017d7b1b91c1dbf33ee1c81d166b3 SHA-1: a6e28600902fe2bd25f952dcb0507d2ec96b312f SHA-256: 6d13443212b7fc41a1efb4746bddd322cd478756b7ed1b71a24118fbf1430c62
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to exploit user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7703

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/razvivatel/yapz/~3/1LSSs5qy-i4/square?utm_term=find+product+by+sku
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e9457f085b1c120f99517d/1625900415102/passion_project_ideas.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec714a2de9850677716f09/1626108234389/molecular_structure_of_the_cell_membrane.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e95e16dc37083541ba8a1e/1625906710856/5041632223.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_off0000cc03.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC03 16792 bytes
font_01_sfnt_off0000e415.bin
e1b010eead2aa9f71ad6d201e74069e3ea8fbc77464be4023c07326be0e6676e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE415 16116 bytes
font_02_sfnt_off00010db9.bin
e4a22d0659baf1bc99a29131156281aa8e06bf11afbd84c09e00acef7266dbb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB9 10592 bytes

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