Malicious PDF — malware analysis report

Static analysis result for SHA-256 10dba80ec1f6fef8…

MALICIOUS

PDF

79.5 KB Created: 2021-07-17 03:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5f3016b1b2d4300bf2071f7477cefcf1 SHA-1: 44c75e0131545be223caf4924cca9293f2b088d1 SHA-256: 10dba80ec1f6fef8a1a26b695c0a6fc91c615d13bcdc6b311de87038aded037d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains embedded URLs that point to external resources, suggesting an attempt to redirect the user to potentially harmful websites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, likely involving phishing or the delivery of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8374

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/razvivatel/yapz/~3/UkUWPC8UKDU/square?utm_term=designs+on+nature
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e87a176ec42c2cdc56fe7a/1625848343845/echoic_definition_psychology.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f074283576e9290f940882/1626371112243/2002_duramax_for_sale.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed0b952ae47d2ac91e4a8a/1626147733376/cloud_gate_chicago.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60efd281e9d3bc6103fbaabf/1626329729490/orthostatic_hypotension_symptoms.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f200ef7561a248fec4f45c/1626472687810/92489484877.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_off0000d80e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD80E 16792 bytes
font_01_sfnt_off0000f020.bin
72e94abc87dfef3b0198ee9229f438a3722c21d755a5b974008e6e2867214c9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF020 16448 bytes
font_02_sfnt_off00011ae9.bin
b95f2b92d787d6a2c3e552b6e1d7bcff0ca5ed86865e71a30ab34134fe56f3c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE9 10336 bytes

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