Malicious PDF — malware analysis report

Static analysis result for SHA-256 3479e76dfabc3d32…

MALICIOUS

PDF

93.6 KB Created: 2021-07-15 14:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c47236889904e97859f5500936c715b2 SHA-1: e51f69a56adb2aa578013981ed5b59bbae3495ce SHA-256: 3479e76dfabc3d3224e3bebb32f17818ebf9b8c4a91b0b30f10b0ca726fcb758
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The PDF contains embedded URLs that lead to external resources, suggesting a lure to a malicious site. No scripts were extracted, but the PDF structure and embedded URLs point towards a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8587

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/~3/4Ji06Fp1PxY/square?utm_term=toeic+writing+sample+test+with+answers+pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee645ab82b30476862cb4b/1626235995121/20338239441.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee329139b8260338697106/1626223249254/voxetovedusevofubolim.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edb3867daf0c15b06b6dd7/1626190726547/woseromenajamar.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eda00bcd5f69124b4167ec/1626185739562/nudejeli.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eda1a8c8cbd011b90c35aa/1626186152256/sutinofofozajevu.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed9207fc46f1629a0746ea/1626182152113/rough_scaled_sand_boa_for_sale.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8a79f3817d36d1155b4ff/1625859999730/44108838404.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_off0001073c.bin
afc6ee848ff860ef1b3a2ad8192581cf1434d03ef035cce01d5a29665da8b9de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1073C 11116 bytes
font_01_sfnt_off000120d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120D7 16792 bytes
font_02_sfnt_off000138e9.bin
b21b52203e90b364eb4b4f60ed13d30e9b539d4cf8569461991f567e9154200e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138E9 18164 bytes

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