Malicious PDF — malware analysis report

Static analysis result for SHA-256 846a25270e9d8c21…

MALICIOUS

PDF

80.7 KB Created: 2021-03-07 04:48:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e48c6de99d14350c18583642c9daf9b7 SHA-1: b38829583115dee64e98b76270fd47420f964775 SHA-256: 846a25270e9d8c21781128143fc52fb473c832720199082cfd0910f09d058376
96 Risk Score

Malware Insights

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

The sample was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'jacksth.ru', which is likely part of a phishing or redirection scheme. The document body, though heavily obfuscated, suggests it is attempting to mimic search results or informational content to trick the user into visiting the external URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wix?keyword=natural+armor+feats+pathfinder
    • http://sodahq.club/jovodosumoxuf6e374.pdf
    • http://jenupekob.iblogger.org/52278323688.pdf
    • http://pasendapp.online/detorofawiseritosiviregm4a0x.pdf
    • https://cdn-cms.f-static.net/uploads/4449616/normal_5fd3cd364347b.pdf
    • http://steblin.pro/what_percentage_of_cocoa_in_dark_chocolate_is_healthydcxpq.pdf
    • https://cdn-cms.f-static.net/uploads/4368777/normal_602bec08b3f40.pdf
    • https://static.s123-cdn-static.com/uploads/4370266/normal_5fdff68968aa9.pdf
    • https://cdn-cms.f-static.net/uploads/4393625/normal_600bfa6f33398.pdf
    • https://cdn-cms.f-static.net/uploads/4366365/normal_601583c027480.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_f92e0e46db9b4052bb0560eb61c2c84e.pdf?index=true
    • https://711920be-b761-4f0e-a604-762b26663b16.filesusr.com/ugd/ffcbea_623e92d12c3245e380d2f01f16dd1ae7.pdf?index=true
    • http://wetoxikilosawa.epizy.com/lokoke.pdf
    • https://uploads.strikinglycdn.com/files/15301bd8-382f-4ec4-984d-a14500711fab/how_to_use_tracktion_7.pdf
    • https://fac30f9c-1bc3-4ff6-ac40-7ced1d2a170b.filesusr.com/ugd/3b7182_7463e7256d224f17a4cac3bd08c7c54c.pdf?index=true
    • http://fonimegalidoxu.epizy.com/what_is_literature_definition_in_english.pdf
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_e635587c17cb4e29ae323b6ef19f51fe.pdf?index=true
    • https://uploads.strikinglycdn.com/files/df610ce0-f4c3-4481-b40c-3040dded2db3/can_you_use_3d_warehouse_with_sketchup_free.pdf
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_0dd984d2d1d0473a98379f3520cbfed0.pdf?index=true
    • https://75cc4b12-69da-4024-8422-75f9303faa99.filesusr.com/ugd/d6c222_883f66c53fde41c5be4871d1f7652905.pdf?index=true
    • https://uploads.strikinglycdn.com/files/24ddf25c-f8a2-4b42-8b6c-298799482aa2/wepofinezojilono.pdf
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_4febcf78241147b0a4a7bb2331522e21.pdf?index=true
    • 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_off0000fa24.bin
0132d496c346f5f1195b8d728baa2017e66a50d49380770406475c7110e46be8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA24 5248 bytes
font_01_sfnt_off00010bd5.bin
d3b639ff4d448485e9b34075a2bc5f2f102cb81a52d67ae7ca0aa37d04cefca5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD5 12852 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.