Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c39cbaaae39d06…

MALICIOUS

PDF

81.3 KB Created: 2021-07-13 02:14:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 26a1cfee84ec56071905b1c14720a95f SHA-1: 97ae680c140f502655bc7605cc8a8a83660383d2 SHA-256: c3c39cbaaae39d0610d68fb8f27be11e5d802ebcaa88b6bac63c779d68bb1c15
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing attempt delivered as a PDF. The PDF contains embedded URLs, suggesting it may attempt to redirect the user to a malicious site or download a secondary payload. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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/jEScUJLm1bs/square?utm_term=the+unhappy+marriage+of+marxism+and+feminism
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec7caf154eb17b684942e0/1626111151376/how_do_you_remove_wax_from_candle_holders.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec9b321d0b393375531622/1626118962645/weighted_average_method_example.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8bb9fc5d97713370812c2/1625865119915/3_pm_edt_to_ist.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e88e1118d2642310526fe5/1625853457247/tudigumuset.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_off0000daac.bin
fdc22909954f2997c1fe0a41f4f711008754239066e3360581d983e44d27946e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAC 17428 bytes
font_01_sfnt_off00010875.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10875 16792 bytes
font_02_sfnt_off0001208c.bin
220ee2e5b4011aa8e37225043820bd99f72776da030d756df54b4aaf71299ae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1208C 11080 bytes

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