Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf62e649e28921c…

MALICIOUS

PDF

69.5 KB Created: 2021-02-17 21:28:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0611c8dd696e0155592a4aee82afbec8 SHA-1: 476153c3ef8bf2f100e53defd6c3921b2a70e03f SHA-256: 7bf62e649e28921c7ae50b4a73ca0f95d921c8725d5ffbe4f23c16897e92457e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://seumenha.ru/wix?keyword=fronde+ap+euro', which is likely a phishing or malware distribution URL. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=fronde+ap+euro
    • http://salestore.pro/17360420724edhot.pdf
    • https://xidumalebuwun.weebly.com/uploads/1/3/4/8/134894794/607d821fa3e8c.pdf
    • http://vizionsmc.net/88280987552191h0.pdf
    • http://oneitshop.info/arabic_fonts_free_for_phontots7ar.pdf
    • http://just-gopro.com/troy_bilt_5500_watt_generator_engine_manual8jl15.pdf
    • http://trysol.xyz/lovavupujidemaxoopf1o.pdf
    • http://businessoutsourcing.info/vepokalipotakanimalacy3e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gedexim/newspaper_report_on_environmental_issues.pdf
    • https://s3.amazonaws.com/pafexegud/beautiful_camera_makeup_selfie_apk.pdf
    • https://s3.amazonaws.com/minaxigevani/bstc_ka_full_form.pdf
    • https://s3.amazonaws.com/luborinizu/9301335279.pdf
    • https://s3.amazonaws.com/wutisigila/sasibumosexisavadojilik.pdf
    • https://s3.amazonaws.com/julaxel/povifusulosamofikela.pdf
    • https://s3.amazonaws.com/zifilobesumafi/64954540012.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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce54.bin
4255df26261c28085010b350b6fa8ff41c08d53f5ea4dad816695b0fda070ae0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE54 4700 bytes
font_01_sfnt_off0000de54.bin
c0e39f44321a474cc328806e737293db5bfd2873d0430c567f64257ef24eb06f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE54 1716 bytes
font_02_sfnt_off0000e6df.bin
3e88d56cdc56ce336ee5d8ad5ce1de71b90b027e9c88b984db2538638bcb8117		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DF 10084 bytes

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