Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd13a3b933c5106…

MALICIOUS

PDF

87.6 KB Created: 2021-07-16 12:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d59789a7f5e1f5fa652c36db2b5a4db1 SHA-1: 02bfd9e8f945c25586f962a80545b1e10f1e59f0 SHA-256: 9dd13a3b933c51061c7cc028d506d0f42761957fa45162152d5de7d330226779
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, suggesting it may be used for phishing or to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs are common in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8627

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/UkUWPC8UKDU/square?utm_term=in+an+isothermal+process
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec7b67bdd82073f6fe3595/1626110824080/what_words_start_with_the_letter_p.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edede8ea8d40126a1db1fe/1626205672503/nupox.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee29a0b1f8b95648845838/1626220961451/44818221353.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec98d59c874e714249cb94/1626118357571/4294150011.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee1568fc191471fc698d3b/1626215784934/pornography_and_censorship.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7cd6069e16759cf751d59/1625804128445/lord_of_the_rings_the_dark_tower.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee90582d09e34b72a44bd3/1626247256451/67100151217.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_off0000ef22.bin
58ef70ae2be7c277113bbbce462afd818ce88c33affa8c0dca7147ae1e1a15b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF22 10592 bytes
font_01_sfnt_off00010720.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10720 16792 bytes
font_02_sfnt_off00011f32.bin
c84c05b60d3b86d4022940967ce625914c234a7e912425218aae7e9930a9bf45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F32 19368 bytes

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