Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8f754137cefd917…

MALICIOUS

PDF

73.8 KB Created: 2021-07-17 23:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f07926aebc354e00a9a00e820fb9027a SHA-1: 2c88a22c751cf88426b3a6db1e9808b9aa4df26d SHA-256: d8f754137cefd91718bc71bebe99730f6d6801c8cde51983dc150722fef8a79a
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a visual download button and embedded URLs suggests a phishing or social engineering attack. The document likely aims to trick the user into downloading a secondary payload by presenting a deceptive call-to-action.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7703

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/razvivatel/yapz/~3/kVSxLQpkboc/square?utm_term=lock+pdf+file+from+editing
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec7e4b7726b430b467bf71/1626111564011/bow_wow_ft_ciara_like_you_mp3_download.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f314927e0b4d5f6b17c2e5/1626543250882/dowseys_dbd_borderline_icon_pack.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f03b075d627c4551e588b4/1626356487420/16288999505.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_off0000c1d4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D4 16792 bytes
font_01_sfnt_off0000d9e6.bin
d53a098e0cd38cd6d1e230c0dfec08f779dac651df747326a6af493dd42361f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E6 16048 bytes
font_02_sfnt_off0001038a.bin
a64b0108b5498658ee0fd5a6d00b38903875f698ef3f02bca1e5de2cb79dddbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1038A 10680 bytes

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