Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7fab3bdee2b069a…

MALICIOUS

PDF

75.7 KB Created: 2021-07-14 04:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f1f48a65cc76af079e0165bcc2a6b6b6 SHA-1: 4b6e68bfc3e4e264649817a55062d09578f6e0fe SHA-256: e7fab3bdee2b069ac8eeb3e70a08a1f4c44f99d590e28bcb6ca21b2f64192678
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by a machine learning classifier and ClamAV, with heuristics indicating the presence of external URIs and embedded URLs. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lure the user to malicious content, likely for phishing or to download a second-stage payload. The primary attack vector is likely spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9186

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/UkUWPC8UKDU/square?utm_term=letting+go+candle+spell
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee03ccac614e13d133dbdc/1626211276666/hunger_games_free_online_stream.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e91e222210ba6bce1208cd/1625890338263/crooked_creek_subdivision.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8552dbb514329faf5262/1626113362123/apic_infection_control_manual.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edb651c0b9b61b597740d1/1626191441895/dadeva.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee32607c5bce1f334c2c52/1626223200590/methanol_lewis_structure.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_off0000cb29.bin
3c73f49a58aa72dd517f87eb98af2ce7745754f4d6569ca7d3fcd5383164c796		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB29 15560 bytes
font_01_sfnt_off0000f2df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DF 16792 bytes
font_02_sfnt_off00010af6.bin
3f5bafb85a8ad9c91261f7a179c69e532b6f9fcd4a0d6426473b5e1a1ac53eb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF6 10544 bytes

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