Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b0da672bf9fe03…

MALICIOUS

PDF

79.3 KB Created: 2021-07-14 03:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 511c35c30340a5633888324762736a16 SHA-1: 4018c3ab48c2e8c5da1f4c919734aeb8c5f5ad88 SHA-256: 72b0da672bf9fe03f3afb817f289f06b1b9b81e2c8377d585ea4b9af4102a9f6
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classification and ClamAV, indicating a phishing or trojan threat. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to malicious content. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8740

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/~3/9xivtwLAy4k/square?utm_term=my+tom+and+friends+game
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ecee498c96c6301f8e3017/1626140233076/hepatic_artery_infusion_chemotherapy.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e91f973ba7d954d54624ff/1625890711463/icd_10_anaplastic_large_cell_lymphoma.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e878b833c3d3411a9868e6/1625847992490/1543651108.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed857e4918f36a6d61873d/1626178942460/susaviwexawiruvapuge.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e9598537cb904475619f99/1625905541650/what_does_it_mean_to_be_coined.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8cd50b80adc27fb5913c5/1625869648282/how_to_add_more_in_one.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_off0000d49e.bin
53ea53d68b4530100984c1c3508cac18b0442c7f21cafb8b6a8bba5098754eb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD49E 10760 bytes
font_01_sfnt_off0000ed26.bin
7b539c8221a20a2a298d8891919b5416937a789148c09fb6a3c839a8e0c4eb6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED26 17008 bytes
font_02_sfnt_off0001197d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1197D 16792 bytes

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