Malicious PDF — malware analysis report

Static analysis result for SHA-256 85213f879631f161…

MALICIOUS

PDF

80.8 KB Created: 2021-07-13 06:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e03948732051d12268507f01ec37b430 SHA-1: a9e0ee327866a75d7ee773e70709909f6949d51c SHA-256: 85213f879631f161149ca7816297d675b6a49a897556a38a28ba73dc2ebd509e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that mimics a search result, likely intended to trick the user into downloading a secondary payload. No scripts were extracted, but the presence of the malicious URL and the high confidence detection indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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/~3/7R6buoffwiA/square?utm_term=the+cell+a+molecular+approach+8th+edition+pdf+download
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8d2accf7eb70360bd727a/1625871020900/long_names_that_can_be_shortened.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e9459db9b95949b65fdbf8/1625900445126/vadofikuje.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec868372e2584f24639cea/1626113667105/electrical_testing_and_commissioning_books.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec9f07c81c37306b3159e5/1626119943803/advanced_scaffolding_voc_questions_and_answers.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e93a2ce51f1f218d6acfc7/1625897516122/write_the_chemical_equation_for_cellular_respiration.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec85bfad4a1a22a3e7967a/1626113471857/27987164811.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec8d5c7d354a5e86a38980/1626115420159/gekegifat.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8af3dbb514329fafe406/1626114803588/the_definition_of_indifferent.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ecf27cfc46f1629aff3eee/1626141308517/coffee_and_leaky_gut.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ecccb5c4f5a641a5a49ccf/1626131637503/what_is_a_nonrenewable_resource_definition.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec796f0cf33f708d795a7a/1626110319761/crack_assassins_creed_3.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7732a4b2b7f268b96048b/1625781034666/96860406705.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_off0000d987.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD987 16792 bytes
font_01_sfnt_off0000f19e.bin
690240ef1b045c22f87b95a7a8634be9f3bc414edcf0cd78f1fa59f5649730fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF19E 11076 bytes
font_02_sfnt_off00010b42.bin
5496f93c41edf0f85073d967d2516bba16ed9725194d84f6f529fc7fa68bcf6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B42 16528 bytes

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