Malicious PDF — malware analysis report

Static analysis result for SHA-256 9878bd78f12b2769…

MALICIOUS

PDF

72.8 KB Created: 2021-07-13 18:20:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4b272dfba9f28e72e2a6f1770f30d978 SHA-1: 5ff19d0aa8c5f63416d10ef9caeb494be6bfb266 SHA-256: 9878bd78f12b2769f2fee7f0b853a71a34cd436e07438d69ecb43aa1d7393247
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains embedded URLs that likely lead to malicious content or further stages of an attack. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8363

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/UZrB20b2Dcg/square?utm_term=tg+fiction+with+images
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed5fcffc46f1629a04b4b9/1626169295284/14g_to_oz.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eca1f6e0914637f38dd848/1626120694791/gazes.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec793fdcef4a49b3a9ccbc/1626110271722/pimple_popping_cystic_acne.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7c76d7be683581ce1a6a8/1625802606163/22214920757.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8bb767baa26076bca37a/1626114999309/narcissist_traits_in_a_relationship.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ece2c9c1f2f619459c942f/1626137289189/9556813729.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_off0000bb57.bin
221883ff4fd99d9bbb9657c2d375aca2dae3b086d5ac5bf414269e1660612179		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB57 16828 bytes
font_01_sfnt_off0000e6de.bin
1f93d41890cd3d5b1f7030f1ae0df3272179407d41058ecebfd605781941961d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DE 10688 bytes
font_02_sfnt_off0000ff54.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF54 16792 bytes

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