Malicious PDF — malware analysis report

Static analysis result for SHA-256 415ac7d7e538b8f9…

MALICIOUS

PDF

77.8 KB Created: 2021-07-16 16:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2312f63a4b16c88eb61ca933b43eddc0 SHA-1: 72127a8326dd0cb2acd67839940c8932edf1ecc8 SHA-256: 415ac7d7e538b8f957dc36aa5e15538489e471776500b4443b26731b59c7360f
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a 'download button' heuristic suggests a lure to trick the user into downloading a payload. While no specific script was extracted, the overall context points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7691

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/~3/5JeRQhMeIYg/square?utm_term=how+to+change+colour+of+signature+in+pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7b15051cb2a526cfa6b11/1625796944245/introduction_to_blender.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee7e526bb0602df2151c75/1626242642591/wasovugobaxenez.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed9bd6262c1d4011345869/1626184662585/independence_day_status.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_off0000cc09.bin
1f9a2295f2af0d7d746b0db8d4137a8c2c5d7691f20628870c120211a9834e1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC09 17480 bytes
font_01_sfnt_off0000f9b4.bin
3a131d698a437a57e3a50e1abb48d67cf4ddb0f17e252d46ad03b7020027d63a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B4 11076 bytes
font_02_sfnt_off00011349.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11349 16792 bytes

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