Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba06209573509faf…

MALICIOUS

PDF

72.2 KB Created: 2021-04-18 06:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d39b491e48726cf7a535fb868c2019c1 SHA-1: 7ecdc3dbf13c6f80b8d1d6a21da4e93d1f357d80 SHA-256: ba06209573509fafedca9c926070b5552158319880113842e0a427ff96c38b33
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a PDF SEO link farm. One of the primary external URIs, 'https://midufefew.ru/strik?utm_term=how+to+analysis+risk+management', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/strik?utm_term=how+to+analysis+risk+management
    • http://kihepc.xyz/974969366440y5ea.pdf
    • http://migunovaj.iblogger.org/instagram_stories_ninja.pdf
    • https://giboritozi.weebly.com/uploads/1/3/1/3/131379296/fuvitefexob.pdf
    • https://motuzepiruwilo.weebly.com/uploads/1/3/4/3/134348631/wituteke.pdf
    • https://cdn.sqhk.co/nezipumosot/ieifgic/zilitudodes.pdf
    • http://simcars.ru/sagimoxujozebimens3t54.pdf
    • https://melesosinipedo.weebly.com/uploads/1/3/4/4/134475371/8872049.pdf
    • https://cdn.sqhk.co/zuronenom/jgn90ia/30859881939.pdf
    • http://artyom.guru/33899555063u4mav.pdf
    • https://felomogolupa.weebly.com/uploads/1/3/4/3/134345494/vopokofivudijovisavu.pdf
    • http://nubolats.xyz/5609269376sk8st.pdf
    • https://buresususotolo.weebly.com/uploads/1/3/2/7/132710635/4135571.pdf
    • http://erogancolumbia.site/logenotesegexum8bdyl.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/757d409e-4bdc-48c5-aec0-e0c3a963c4e5/97425286219.pdf
    • https://uploads.strikinglycdn.com/files/b2463c97-2e07-442b-b293-3c345220b385/losin_it_movie_soundtrack.pdf
    • https://uploads.strikinglycdn.com/files/ba191ffa-fa0f-4cae-9332-47658f82f7fa/arduino_uno_circuit_diagram.pdf
    • https://uploads.strikinglycdn.com/files/9856836d-adc9-4f50-b6a4-cd9a3a781fb1/kawasaki_mojave_250_carb_adjustment.pdf
    • https://uploads.strikinglycdn.com/files/f201bac4-4e83-4cdf-8131-fa93135321fb/mujuse.pdf
    • https://uploads.strikinglycdn.com/files/195f5c52-fa2c-43de-899b-25698c1b56ce/baduwutonoluneroxawepuv.pdf
    • http://disozisujenat.epizy.com/limits_of_indeterminate_forms_worksheet_answers.pdf
    • http://dovitunazimaze.epizy.com/76301806112.pdf
    • http://gonuvatujuj.epizy.com/72291707963.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd5c.bin
e8ce746f32cc10381179582e90e602936de3ffca84d525f4e2a45ed65b47316b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5C 5224 bytes
font_01_sfnt_off0000ef27.bin
c3b3dbb748aabf5fb33cc9136604f977426de8cd577f66e317853bfd823cae6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF27 10704 bytes

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