Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d1bdd872617b5f…

MALICIOUS

PDF

82.4 KB Created: 2021-07-18 09:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7df86efe9a3fc84e551a73c4bd39ebaa SHA-1: 766d5a9673ca8b106e586bfdf272ac8bd6aec4ba SHA-256: 68d1bdd872617b5f343a90b26713cadffbe53559e4c8b04ae4669d151cea32f1
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. It contains embedded URLs that point to external resources, suggesting it's used to redirect users, potentially for phishing or to download further malicious content. The presence of PDF-specific heuristics further supports its classification as a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8440

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/razvivatel/yapz/~3/gOBB6uaVNRA/square?utm_term=what+is+direct+proportion+in+maths
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed903cbc9b4721000f06ae/1626181693257/author_of_the_tale_of_peter_rabbit.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee8ccbaa539923b58ac604/1626246348008/58505504561.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f35e457e0b4d5f6b1ba495/1626562117514/yeh_dillagi_full_hd_movie_download.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8985896754c2235d49995/1625856088468/christmas_eve_traditions.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f02e96c0b35f4fb3dd3470/1626353302769/82863662044.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60eca43c7d354a5e86a60960/1626121276670/weboga.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_off0000df56.bin
81dfd4bc93e1d26e4ba1c329c60d473b9bbac408c8028cee3a5c2eb6d02d8c47		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF56 17612 bytes
font_01_sfnt_off00010d71.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D71 16792 bytes
font_02_sfnt_off00012588.bin
7942fe1bbf23e348217be2122959db2f8078357937fa34244ec21e64aadb6c3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12588 10728 bytes

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