Malicious PDF — malware analysis report

Static analysis result for SHA-256 d35ec7772ebe5ff8…

MALICIOUS

PDF

160.4 KB Created: 2021-07-12 23:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 74b620ce9229b627669783265af6131e SHA-1: 7a92859bc6b1caec683eaebbcc5f56e4071dad42 SHA-256: d35ec7772ebe5ff8792c699a3d606782f3bcb0ead8a1f2a3a0f172f6619c8413
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 high likelihood of malicious intent. The PDF contains embedded URLs that point to external resources, suggesting it's used to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it may leverage embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5498

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/X6hrLWyzjlw/square?utm_term=strategic+tactical+and+operational+planning+pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8c305338e9546e474e4e/1626115120983/feasible_research_topics.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8d20ba15cb06cdb5e4c65/1625870860020/50015600702.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8e1f1e51f1f218d66b8c7/1625874929539/question_and_answers_for_an_interview.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8f0b7b132fa362071063d/1625878711891/pain_in_calf_down_to_foot.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e84cf830ecfa0852d53c68/1625836792684/3358748827.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_off000212c5.bin
9bc7ea1348a3a43b2dc398de4c1759e7d41dae12d9a6208bcc9be9a916f5dc15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x212C5 19392 bytes
font_01_sfnt_off00024466.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24466 16792 bytes
font_02_sfnt_off00025c7d.bin
2c09f8898f0e33a0e9f8f2307cffe1ab74a3429b812343a28838894386a209dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25C7D 10704 bytes

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