Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e4cc88370c45680…

MALICIOUS

PDF

82.2 KB Created: 2021-07-22 23:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f9971037c3377193f76675cf4874c44f SHA-1: 29f4cc9941d00d52ad6ddf9b787c6acab4625e05 SHA-256: 8e4cc88370c4568034a96a56841eda2b4719bdd6a581b9475fc1a769a3b050ab
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://medvor.ru/square?utm_term=sweet+dreams+baby+quotes', which is likely a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, fitting the pattern of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://medvor.ru/square?utm_term=sweet+dreams+baby+quotes
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f8e22c3dc1753e7ba65c72/1626923564907/toxoplasmosis_in_cats_symptoms_and_treatments.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f40d44d9389f5e8094cfa3/1626606916373/pipubulurujinawoziramiro.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f86c4756cc3e0d5f2380d3/1626893383579/red_sox_catchers.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f037aa96309e3685adcba1/1626355626951/bread_without_butter.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f65bc20e346c31115744bb/1626758082929/land_use_attorney.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f3db6270ff22042a0a3332/1626594146336/85888521804.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edc1074ff81d3e2810c169/1626194184110/fases_del_pae.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f85b419f074421d46ac62e/1626889025220/ppdt_stories_with_answers.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f48e44689a653fd2a4b199/1626639941005/age_of_sigmar_2.0_core_rules.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f613aa3ca5073dfd5f3904/1626739627058/94119604172.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec8f659c874e714248955f/1626115941717/49510394695.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f05bd895008556a2839cd5/1626364888826/lomazifepufinamufa.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f3474b36db6462519fb371/1626556235368/91015847081.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f08a8f6a886d5aacf3558c/1626376847430/tracy_chapman_is_she_still_alive.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1108cf75f957e35b639a3/1626411148533/turogu.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92f8b37cb9044756076e7/1625894795965/bowame.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f610c8bd95132ca723a909/1626738888266/keburupazunudit.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_off0000ddb7.bin
e345c9f155902d64f08604281748a314e4834e967b4c5b8230aac0302ca952bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB7 16844 bytes
font_01_sfnt_off0001096f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1096F 16792 bytes
font_02_sfnt_off00012186.bin
945a223e2aef0bc0917df9a7243cc3f607c79969e87ed9c68f9fe8db2e547ff7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12186 10828 bytes

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