Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb27a90776fb0f60…

MALICIOUS

PDF

87.7 KB Created: 2021-07-22 01:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5e3d317029c1a6c708531bf285e3b9e7 SHA-1: 2fc2f2c73241d6e1bce9fc03360cac731567f68a SHA-256: eb27a90776fb0f60264181f2319b14392c9378653838940f33c954643844ddf8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'crewmak.ru', which is likely a phishing or malware distribution domain. The PDF structure and embedded content suggest an attempt to trick users into visiting this external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/square?utm_term=pokemon+sun+and+moon+full+episode+in+english
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed8eaceaa19e084bc228ed/1626181292687/zuxosofajisimogijir.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f75275e796056bce07b3da/1626821237136/posavirexosudufofor.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8e8f137da2614570b2dfe/1625876721958/jimawafaneruvomowav.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edfa18a4137771ba0508bf/1626208792537/siguwodufafuxepi.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93f1b309bd63f3d86ffe5/1625898779255/baltimore_radio_stations_online.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f666dc38c0e047d366252c/1626760924750/whats_a_jacobs_ladder_piercing.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f651ba6c8d901dda42bd4e/1626755514131/pawirakipafuwikikog.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f02929e00eb31d7cef741f/1626351913993/radem.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f594733815523cf5c0e664/1626707059994/before_and_after_lipoma_removal.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8eda44349d7bb06d2e79/1626115802733/define_lewis_acid_and_base_with_example.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f1ffe24b0f882b4d77e453/1626472418504/difol.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f892309f96d85b0b8c3cd4/1626903089049/data_structures_and_algorithms_notes_free_download.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f16c613d214e0c07847e6f/1626434661818/16691586612.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee7273f6c772366d3119e7/1626239603428/75753774804.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f54b5eb282b304dad2d400/1626688351092/gas_adsorbed_by_activated_charcoal.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0d15fff43f805444d6ef7/1626394975564/best_low_price_share_for_intraday.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd39.bin
e31c0c956864c56b9e54235d0e2cb0351202998f62f0305b22162fba868e502a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD39 10940 bytes
font_01_sfnt_off0000f620.bin
0b5448c6de0ed0f116d2c680d9cb6f47e90a51602807fce3603fd82f599d96d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF620 16376 bytes
font_02_sfnt_off00010c14.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C14 16792 bytes
font_03_sfnt_off00012426.bin
7f1a681c3a1fedafb99de5ae97e244da4a1cf503d3549c7189cdcdc4bcf81eed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12426 17168 bytes

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