Malicious PDF — malware analysis report

Static analysis result for SHA-256 5930dacec6515ad8…

MALICIOUS

PDF

83.0 KB Created: 2021-07-21 13:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c9484bfb19fef6e48c75c188ce38f69f SHA-1: 77c68d665c38a7d4b98f7aa61a5ae3b7689c7882 SHA-256: 5930dacec6515ad875d18e98ace31262a032aa11966f82c21625a73e121dad53
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 phishing or trojan threat. It contains embedded URLs, one of which is flagged as potentially malicious, suggesting a lure to external content. No scripts were extracted, but the PDF structure and embedded URIs point towards a malicious document designed to trick users into navigating to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8847

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/um1bUVUAM38/square?utm_term=thanks+response+email
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e93a2ce51f1f218d6acfc7/1625897516122/write_the_chemical_equation_for_cellular_respiration.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed9d398d40d36f0083e9d8/1626185017324/how_to_combine_files_preview.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f74ed6ad9c447d9ac38351/1626820310631/fowivesukevevirisaje.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f779a8db951209c4779d92/1626831272622/84603378615.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f31ec8deec5816202c9c37/1626545864714/kijoj.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f697de37c10b4821a48bdc/1626773470832/song_of_citation.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f5351a0b1749089223f572/1626682650448/smooth_criminal_american_pie_2.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_off0000e50a.bin
184bbb93b10a5634819cc26768e4a1a4211c04f05b63d3d71286c67cd8d57daf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE50A 10472 bytes
font_01_sfnt_off0000fc8e.bin
93dfac77c7cfc00e11e93ed28345e7c00b7b636965906f27fd4de64da85a7263		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8E 16776 bytes
font_02_sfnt_off00012850.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12850 16792 bytes

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