Malicious PDF — malware analysis report

Static analysis result for SHA-256 5831f80d069a3a6e…

MALICIOUS

PDF

82.4 KB Created: 2021-07-13 06:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 83eae5b49fba4966a71b22d79ee616a8 SHA-1: 7a7cd0b5fd79dd2605a377963d06d3455dddf8c0 SHA-256: 5831f80d069a3a6ee91bdad0b5d8f0ccaaaec48d7b263a9da1f7e2385bf82958
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The presence of this URL suggests an attempt to redirect the user to a phishing or malware distribution site. No scripts were extracted, but the embedded URI is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.1542

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://garglob.ru/square?utm_term=hey+arnold+helga+on+the+couch
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ecb225ffa5e93eb2939a93/1626124837947/rcl_daily_readings.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ecc4b4991bac56a5cfaa5a/1626129588333/amazing_heart_touching_quotes.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_off0000e424.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE424 16792 bytes
font_01_sfnt_off0000fc36.bin
f11a3b559f46143f9cd1ba7125d26bc972aef97e862f3c85315e3b384cf15b99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC36 16240 bytes
font_02_sfnt_off0001260c.bin
7db234f6ea6d7ca65bb7480097f96837f66151ce44667b21ac79f8a05c78203a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1260C 10596 bytes

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