Malicious PDF — malware analysis report

Static analysis result for SHA-256 454968e3c57cd474…

MALICIOUS

PDF

74.9 KB Created: 2021-07-13 15:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 38f5466de17d04f1af2eebc69032de2b SHA-1: 3a3cb6ad977e9f5805f58425273a72f4d1828baa SHA-256: 454968e3c57cd474ab1fee22148dff471f9bd80242db14306dca7ba937c42dc6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious. It contains numerous embedded URLs, some of which are associated with phishing or malware distribution. The ClamAV detection indicates it is a Pdf.Phishing.Trojan, suggesting its primary purpose is to deceive users into revealing sensitive information or downloading further malicious content. No scripts were extracted, but the presence of embedded URLs points to a phishing or credential harvesting attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/WVKuihPcy9U/square?utm_term=prolapse+after+hysterectomy
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8d1a75ef51a130ea0a9eb/1625870759349/10_day_luteal_phase.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7977648fdc259403ce999/1625790326823/indigestion_in_back_and_chest.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e77a65e17c3d487fa177c2/1625782885454/38722141170.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed5f853b21860fe67078e3/1626169221653/beleref.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e924f3854c1d3b34871733/1625892083179/morrison_and_boyd_organic_chemistry_free_download.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec9eb111a746407a43dc7d/1626119858323/lodubulir.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7febad4a1a22a3e71577/1626111979641/poratefexijaku.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_off0000c4d4.bin
7e60c91454b68eee73892ae1a3b42fe5e90161939cd6d17bccd4f745e73aa4e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D4 15744 bytes
font_01_sfnt_off0000ed37.bin
515cf83c7ed80e7a467f70b22a99467eacb57788f0f879c4b18db293c6793225		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED37 10664 bytes
font_02_sfnt_off000105c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105C5 16792 bytes

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