Malicious PDF — malware analysis report

Static analysis result for SHA-256 45466dac875a7f1b…

MALICIOUS

PDF

74.5 KB Created: 2021-07-13 03:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f2089a62e856d8873b2480c459066ace SHA-1: b891b6e1b9230a91ebc6ac10b0d2a1bfb10a93af SHA-256: 45466dac875a7f1b7521e5fc624c7d877326e0d3e8e8001f62fd67dadc717de2
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly suggests a phishing or trojanized PDF. The presence of embedded URLs, even those initially flagged as benign, indicates an attempt to redirect the user. The file's metadata shows it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier clean score 0.1751

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/eoPDrVzwpx0/square?utm_term=a+words+to+describe+someone+positively
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec9398cd1a1204f6c97eec/1626117016915/aashiqui_2_film_all_song.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_off0000c30d.bin
01b302f1698cf5cad93682982940845b18fb6c1ebbbaae2cc530c01967ec8c16		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC30D 16488 bytes
font_01_sfnt_off0000ed0b.bin
71873fe1ffa0428089c3dad5bfb08215ac32e3f364c88992f41c13e858be07ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED0B 10900 bytes
font_02_sfnt_off00010615.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10615 16792 bytes

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