Malicious PDF — malware analysis report

Static analysis result for SHA-256 c889da98c26a6811…

MALICIOUS

PDF

75.1 KB Created: 2021-07-13 12:20:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2af4631fee2d6de2987f88aca3531d6b SHA-1: 657dffa00bb73c902555b1b248c2046e171af190 SHA-256: c889da98c26a6811e2a9d9461f2959a6860cf3c23a6e398d21da51a9c298c2e1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by a ML classifier and ClamAV, indicating a phishing or trojan threat. The PDF contains embedded URLs that point to external resources, suggesting an attempt to redirect the user to a malicious site. No scripts were extracted, but the presence of embedded URLs and the overall detection suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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/sq/ugae/~3/gOBB6uaVNRA/square?utm_term=tamil+current+month
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e868370da4b337b3e4423f/1625843767468/setavikogisimi.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec81ab31b0b43e07e6a3ff/1626112427115/consistent_system_of_equations_example.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8e33af807f1e15262aa4/1626115635657/nabefutuwutut.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8efd45711547b6a71818/1626115838014/all_the_best_for_your_future_endeavors_quotes.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec93837dc7460dd09c1ccc/1626116995722/negexuwevi.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e929680cbdad4d35061f96/1625893224878/a_song_of_kabir_translated_by_tagore_summary.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e79e4081471576eae9548f/1625792064506/6314718701.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_off0000c6bc.bin
7364fd3d2ccf97c118ca4e60dd9f26aac9bbf4053cc1b8626e44a1a0c27e98a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6BC 10388 bytes
font_01_sfnt_off0000ddfd.bin
adebce588478e9e55ce1a6f7cdba677b90bea44c16c93eae2690e7b6d886a2be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFD 16296 bytes
font_02_sfnt_off0001087c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1087C 16792 bytes

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