Malicious PDF — malware analysis report

Static analysis result for SHA-256 350033a3f066fb98…

MALICIOUS

PDF

83.0 KB Created: 2021-07-12 21:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b888dc7bdbade87f5fd1b6c7deb4a6c1 SHA-1: f1a17c1839333707e62a621945928977a9aa42e7 SHA-256: 350033a3f066fb982f43963230aaefa0aa32e3607d615840c32dc790ed2d25cf
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 that lead to seemingly benign documents, but the overall detection suggests a malicious intent, possibly to redirect users to a malicious site or download a secondary payload. No scripts were extracted from this sample, limiting the analysis of its execution behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8554

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/sq/ugae/~3/ZV5PD9BTPXI/square?utm_term=lesson+1+homework+practice+constant+rate+of+change
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8e768e6bd1231e604ea11/1625876328117/4_letter_words_with_world.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e86e61936f9f5651d505fa/1625845345351/how_to_see_who_viewed_your_instagram_account.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e93a11b132fa36207454c5/1625897490456/fail_to_authenticate_from_external_provider_pubg_2020.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec7ca3f89f8e700bf6affd/1626111140153/abyssal_diving_suit.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e77991e51ab205da260b7c/1625782673383/flavour_time_to_party_audio.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_off0000dcb3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB3 16792 bytes
font_01_sfnt_off0000f4ca.bin
0e9a1e010749f9a4611780d4616a3ddc66b88f8372cc3f9ae71f42ec9b66824f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CA 11068 bytes
font_02_sfnt_off00010e85.bin
778ff141d0564bc0839d7d2874804ff9524404d5fb6b81fcca08ce6386d9deea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E85 17912 bytes

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