Malicious PDF — malware analysis report

Static analysis result for SHA-256 278db41998703338…

MALICIOUS

PDF

79.5 KB Created: 2021-07-14 00:36:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 377f0d9ff5a717b61bcbc5c69fe23c6a SHA-1: cda6e4891179c04f1d925b3d99f07832c0a723ce SHA-256: 278db419987033382514270f2829c2d1dd028d2414b843b76c187feed45130dd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site or download further malware. No scripts were extracted from this sample, limiting the ability to determine the exact execution mechanism.

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/cEZ-xJcQpFE/square?utm_term=pre+made+thanksgiving+meals
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee03d6537dfa2004089976/1626211286499/vexoxunipiboxesojuzapujap.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec9398cd1a1204f6c97eec/1626117016915/aashiqui_2_film_all_song.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8d79a5ef51a130ea10b8b/1625872282809/31328434354.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7b0312c1416d2f19e76b/1626110723460/red_yellow_black_star_flag.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edf5608f209f4d82865ff3/1626207584220/jazafamozupo.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edbfb930d23a75506046fa/1626193849325/zijajoxipovix.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_off0000d564.bin
feafdcf10bda0afacdc21982b0e9601ee030ae0c4c9f03baa2c72dae4c18bed2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD564 16996 bytes
font_01_sfnt_off00010191.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10191 16792 bytes
font_02_sfnt_off000119a8.bin
c2f0a71747d9aae65022cc778cb06d6fd039ba94e9fede62c112cbf1f503d7ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119A8 10732 bytes

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