Malicious PDF — malware analysis report

Static analysis result for SHA-256 16820633ac6ddf2a…

MALICIOUS

PDF

75.4 KB Created: 2021-07-21 03:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8ed33e2b621da8636bc4e9e9e2293f9e SHA-1: f4d085e1de176218b0e679f60850b3189557e71d SHA-256: 16820633ac6ddf2a68cc417abaff95b43371c3ec701be39d65be8bc78a643b28
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. An external URI pointing to a Google feedproxy URL was extracted, which likely serves as a redirect to a malicious site. Although the document body is heavily obfuscated and unreadable, the presence of an embedded URL and the ClamAV detection strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.1406

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/kVSxLQpkboc/square?utm_term=papoose+touch+it+lyrics
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f64928bc1c1a7c986da0fe/1626753320125/35062609318.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f6187ec24cc7419f7fd2a1/1626740862428/67214016244.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd3a.bin
1af1ad830036736c0c3acc9f8d60c8a932460217b83d8a7353ae10b77f2b8540		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD3A 2492 bytes
font_01_sfnt_off0000c7e2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E2 16792 bytes
font_02_sfnt_off0000dff4.bin
14bd7da904d2bd8b72f83fd665acdcc471a55deef1184a762006f2b47850a189		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF4 16284 bytes
font_03_sfnt_off00010a21.bin
abfad9b7bcc7be8180cb19249b665dea82a8e3035aeac4cb2cafe86e815a937f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A21 10584 bytes

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