Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea9a7e5b2638dcc…

MALICIOUS

PDF

74.8 KB Created: 2021-03-24 01:51:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53f63ee659c7ff6c02cdc8b771d4fc26 SHA-1: d01ff40c6c255d2c766fa7645b5f58f7741d5425 SHA-256: eea9a7e5b2638dcc000a8fad66c7c3c8d58581eb46bddfc91bf57e73a5ad654f
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious phishing content. It contains a large number of embedded external links, with the primary suspicious URL being https://midufefew.ru/wix?keyword=tri+state+running+edgewood. The document's structure and the presence of numerous links suggest an attempt to direct users to potentially harmful websites, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-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://midufefew.ru/wix?keyword=tri+state+running+edgewood
    • http://rebibedo.mywebcommunity.org/interior_design_assistant_jobs_san_diego.pdf
    • https://cdn.sqhk.co/jurugaguvedu/j7pge6Y/29229359013.pdf
    • http://wepijafiguwenan.mywebcommunity.org/how_to_program_boss_gt_1000.pdf
    • https://cdn.sqhk.co/dujujema/A5jcFje/hover_measurements_in_3d.pdf
    • http://wijofotezopadik.medianewsonline.com/gugofatekugofa.pdf
    • https://cdn.sqhk.co/vudupapuj/3aCJQgd/xizelu.pdf
    • http://dejamorije.scienceontheweb.net/90266162377.pdf
    • http://riwaxutitono.iblogger.org/when_can_you_be_intimate_after_having_a_baby.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_874e359fad4c4845848b6cf5882213d5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b7d706b9-1960-4d6e-9abc-7f47fe4f09cf/35094488414.pdf
    • https://uploads.strikinglycdn.com/files/62101381-38fe-4f46-8cbc-fa567e5c5f30/xigalafujisa.pdf
    • https://uploads.strikinglycdn.com/files/0929a94b-7fe7-4d8d-8cf9-4524ac326e78/mamolofep.pdf
    • https://2a1457bb-a4d2-449b-8914-d784a503a6da.filesusr.com/ugd/c0fca2_11b261b16ca94032a00a0e91e9b0d818.pdf?index=true
    • https://f74ea38a-ab8d-49a0-8d31-9a1d7ce64423.filesusr.com/ugd/5ceade_4f60a6a9f1f54dbd80b31575eb11967b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/88d24243-a609-4597-85b0-753e9fc3a170/11518660476.pdf
    • http://vujijemu.atwebpages.com/anfibios_de_los_bosques_templados_de_chile.pdf
    • https://uploads.strikinglycdn.com/files/d64e2a56-fff4-47a3-a644-1fc690f483d3/bugug.pdf
    • http://kuzebelinebofe.epizy.com/1959175921.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_off0000e6b9.bin
31f08104fd9a09e73910976d542dd2fd1ec856b9fd267c5c7aeeb76266694855		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B9 5004 bytes
font_01_sfnt_off0000f7d9.bin
7ab9474d070cfd076b16682384e44283ae9d070a4f953cc44e4985f6bbad6621		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D9 11372 bytes

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