Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3bd5c7743378429…

MALICIOUS

PDF

100.9 KB Created: 2021-07-14 05:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d2ec15554e4500d2d1a4f813c50e723f SHA-1: d74189b25b6aedaa42a8ee073878812f5fe3ffe8 SHA-256: c3bd5c77433784296b1159a26213029ba1c4600bd40a4045a0a1f122274d8f5d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which points to a resource that could be used to deliver a secondary payload or redirect to a phishing site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit vulnerabilities or lure the user into a malicious interaction, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5877

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/eaN1Eb74jJI/square?utm_term=re+calibrate+meaning
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee22853753dc428c8671b7/1626219141567/subway_surfers_for_download_pc.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8df9af4fe78435a3713bb/1625874330036/fortnite_stretched_resolution.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed9a244325c5343bb967fd/1626184228905/phora_with_love_2_album_download_mp3.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_off000129bc.bin
25d2bfdf24581c0ba4b48261d22fb24a392674aaa17d832eebd1f9835d064b26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129BC 17892 bytes
font_01_sfnt_off00015842.bin
7023d17effdd00097da62336c414e3e351512f4022db2c128bfdd8abc78d86f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15842 10472 bytes
font_02_sfnt_off00016ff8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16FF8 16792 bytes

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