Malicious PDF — malware analysis report

Static analysis result for SHA-256 1482104b4dacb128…

MALICIOUS

PDF

91.2 KB Created: 2021-07-13 01:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e942e11bdf62a1fa605f12ee3b5a4214 SHA-1: 681454aa0d633e0fcaa35237c06f4a1c001f44c5 SHA-256: 1482104b4dacb128d5a6867e88032fd3eb9bec4ad4c0d1a3a488d7310c0c370b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The PDF contains embedded URLs that likely lead to malicious content or further stages of an attack. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit vulnerabilities or redirect users to malicious sites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8644

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/sq/ugae/~3/NsX9ihectO0/square?utm_term=difference+between+longitudinal+and+transverse+waves+with+examples
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8d7cbcf8be39b505f97b/1626115452649/bidebopiwew.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7bbbc6d117d6eeca2a9a6/1625799612485/73399924244.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec91d6bcf8be39b5066a69/1626116566424/fahrenheit_451_book_256_pages.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e92b64cc7c08645927335a/1625893732520/xejezixututawi.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e91697c22c005c933840ba/1625888407266/71812572898.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e878a63249a603870a66e3/1625847974674/spudding_in_drilling.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e906cf83ae0c490237fc8c/1625884367140/pazimojapurasogebexi.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_off00010139.bin
c14bab24a44b8d57d1d9d67dd15d630278779bed75a357cd81a48e4be1a503d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10139 16836 bytes
font_01_sfnt_off00012d39.bin
9651892a21468979afe1ac2e053eae0a5f19f64b475bd3c69032543a39c541bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D39 11564 bytes
font_02_sfnt_off0001482b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1482B 16792 bytes

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