Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b2c6ceb0f377148…

MALICIOUS

PDF

82.1 KB Created: 2021-07-21 02:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9cfdb645739c3abaaa1ad8a43448a77c SHA-1: 763400319cb61ef9fec646211ccd27ed59512afe SHA-256: 1b2c6ceb0f377148026ab22851c5ba732b2451210e99022887bc844dbdce5158
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. An external URI was found embedded within the document, suggesting an attempt to redirect the user to a malicious site. No scripts were extracted, but the presence of embedded URLs and the overall detection suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5793

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/u8n3KCQdUYc/square?utm_term=where+to+find+tin+number
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f4757e9471b562af1ccb3d/1626633599007/the_term_hellenistic_is_best_defined_as_which_of_these.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f004dae00eb31d7cedc65c/1626342618986/jazizaje.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f4f4e6d9389f5e80a1600b/1626666215053/68041015577.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0554a316372555b426231/1626363211041/2009_pajero_for_sale.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_off0000e1ef.bin
5cf9553224ea0e084e4c255d09785f62021ea99271c629bb3cb392f6b04b03f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EF 10476 bytes
font_01_sfnt_off0000f984.bin
af733e7c645cd13b7ff97165c47f3fdaf8e65faf1e2118f34bdf9b44faa00259		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF984 16908 bytes
font_02_sfnt_off0001251a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1251A 16792 bytes

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