Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab5263cf96b638d…

MALICIOUS

PDF

79.3 KB Created: 2021-07-12 20:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5cb41464f39e87711e9cb7c06588583d SHA-1: 319afaaedcb17b2dd8543a63ed1d589e28425897 SHA-256: 6ab5263cf96b638d9450dc0f4db9979c20842fb071598d84f0b1c6a122f12d84
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URI pointing to an external website, which is a common tactic for phishing attacks. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the malicious URL is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://allytemp.ru/square?utm_term=laughing+of+laugh
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e935c08fb24157da70c18b/1625896384323/anxiety_hierarchy.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e91bcd27127e680415bf68/1625889741079/relajevusefizoru.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e877dc6b13e67beb16f261/1625847772808/how_to_draw_marvel_characters_step_by_step.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8fb8637da2614570c8037/1625881478848/meaning_of_lue.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec716d7e2b627161599123/1626108269331/juxuzatumafuvixutexil.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec715a0cf33f708d788a5c/1626108250322/bmi_for_10_year_old_female.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7907950202184f0f6981/1626110215519/class_8_odia_chapter_6_question_answer.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e831f1872c4c6263c8336e/1625829873221/lucy_you_have_some_splainin_to_do.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7cc34a431ed42d2fb3d0d/1625803828631/butesanixenufirakufiluvo.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec78547e5cd11affcbf7cb/1626110036934/services_marketing_multiple_choice_questions_answers.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7f4f525441e1b3786f57d/1625814261829/defend_your_castle_game.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e89e726b56ce28892b7f48/1625857650664/simple_example_of_array_in_c.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec72fa2de9850677718ec8/1626108666955/pewivuxosuzigitefam.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7e3b05c1b8460033f2489/1625809840198/muniwiwonuparojid.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_off0000d8cd.bin
c95545fcdd5349557439bf9b3b2fa905d5a9bb255c5159bdb5a93c7870d37d3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CD 10052 bytes
font_01_sfnt_off0000eef5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF5 16792 bytes
font_02_sfnt_off00010707.bin
1c882e14b8d2121408252a6b905a39dedf102437a6e1ef4e40b83f2c34a87d3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10707 16052 bytes

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