Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f95d3c58aa7e2fd…

MALICIOUS

PDF

76.8 KB Created: 2021-07-17 04:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3f8eb4cd8e78f837b76b3250db7ffc89 SHA-1: f2c6f3e540945d974c96905f2941ce987a028f6e SHA-256: 3f95d3c58aa7e2fd9e230a3b5e152943d6b50f5f742f237ef30876dbdc890a7b
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 or trojan threat. The PDF contains embedded URLs that likely lead to malicious content or phishing pages. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit vulnerabilities or trick users into visiting external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8972

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/UkUWPC8UKDU/square?utm_term=rays+of+hope
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8ce43a7a95e0b197fff8c/1625869892098/connecting_pentatonic_scales.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1f5db9fa9a87796d1d668/1626469851127/wuvitanozuz.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edbb3b717471133586765d/1626192699449/zafalin.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f02c16bae8d04216d7c777/1626352663020/45920387964.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ede0801f6a951228700643/1626202240988/flaws_meaning_tagalog.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec9046f4b4775d04a03d6b/1626116166653/kivazabojuxevixarovugo.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_off0000cc70.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC70 16792 bytes
font_01_sfnt_off0000e482.bin
4aeb9ae292c4de954c81d495695b436b6fd735255fa2db9e2332ec918ad945ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE482 16920 bytes
font_02_sfnt_off00011074.bin
4f5b1cea6b83d9ec1678d39d2755ba5efe8b886754887a8bd208c1eec4d283b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11074 10172 bytes

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