Malicious PDF — malware analysis report

Static analysis result for SHA-256 4984d9e74d361555…

MALICIOUS

PDF

75.6 KB Created: 2021-07-13 20:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1064bff3b384f8754114e09e8ea49ad3 SHA-1: e9630b27098715b7bd8e7cef277047585a2c4463 SHA-256: 4984d9e74d3615557962fe4e6309d8047078795e2aaa386bdc2feb4583883058
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 attempt. While no specific scripts were extracted, the presence of embedded URLs suggests the PDF is intended to redirect users to malicious content or facilitate further compromise. The authoring application 'wkhtmltopdf' is unusual for a malicious PDF, but the overall detection points to a phishing or malware delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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/pL_UGxDroB4/square?utm_term=american+crab+co
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec7d8919a16f038d61aab5/1626111369238/philosophical_questions_to_ponder.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed9726c48108232e4462ef/1626183462197/uncertainty_in_measuring_cylinder.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8f392566ded7d61aaf513/1625879442935/19616238786.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7682df4d66f229d3f6459/1625778221550/tujadon.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7c3315eabb22f35d97ec5/1625801521696/lawebanobijeborujixitu.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e93ac0db8bb141bada35e5/1625897664553/xatefujibakefunijotuvel.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edc2bc24c32e4364b119d7/1626194621210/gethsemane_bible_meaning.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_off0000c7a0.bin
37aa0746ac42093a7e541933cf1df2e71a2996f14301a0e9bb94ec07a795aebb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A0 10200 bytes
font_01_sfnt_off0000de6d.bin
5e2dc647cacdcf50957c95e53e781f83999b034a873362e18b161fbebc8f1062		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6D 16860 bytes
font_02_sfnt_off00010a7e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7E 16792 bytes

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