Malicious PDF — malware analysis report

Static analysis result for SHA-256 6caf84b840298757…

MALICIOUS

PDF

76.2 KB Created: 2021-07-13 21:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5caa0b6814f13da71c0a26dc2a3e786a SHA-1: dc17954988e225a1be1451b6f2974ab315a365b2 SHA-256: 6caf84b840298757abca956600fc97a24d219ce00af2e7788d766461b461a11b
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. The PDF contains embedded URLs that likely lead to malicious content or phishing sites. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious domain.

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/sq/ugae/~3/5Aj-mlxkUx8/square?utm_term=quest+ut+answers
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7e13886d8930991a69b6b/1625809209009/42236579725.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec9410e0c99b3eb2d3e47d/1626117136133/nude_pictures_of_granny.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e878a63249a603870a66e3/1625847974674/spudding_in_drilling.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_off0000c91e.bin
0a560f5d6c56904030e2214797b8cb46c964844d6746b3a508d3620c386874b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC91E 10088 bytes
font_01_sfnt_off0000dfed.bin
84f4522384e9d6306a358013257a6c7419a0b6514f2b8eb7afabccb0c6157149		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFED 17328 bytes
font_02_sfnt_off00010d60.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D60 16792 bytes

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