Malicious PDF — malware analysis report

Static analysis result for SHA-256 43ec0e6e7fc41540…

MALICIOUS

PDF

80.2 KB Created: 2021-03-30 21:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8207f8b0f4679c0cef1960e141407f58 SHA-1: 5a6aec9503a25d0ddfa73e1311b281e2041712d7 SHA-256: 43ec0e6e7fc41540b927416a25bdd444c61406cd3d03914d6ce6db7712294946
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL disguised as a search result. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The primary IOC is the external URI pointing to 'jumiwimov.ru', which is likely used to host a malicious payload or redirect to a phishing site.

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://jumiwimov.ru/award?keyword=macbeth+character+key+quotes+pdf
    • http://cocobeautybar.ca/funny_pictures_gif_animation150o3.pdf
    • http://inmyshtangen.xyz/what_is_wendys_most_popular_menu_item7rsfg.pdf
    • http://chategratis.online/baldurs_gate_2_romance_jaheira0703o.pdf
    • https://cdn-cms.f-static.net/uploads/4409421/normal_602a209dc9cad.pdf
    • http://fitokaps.xyz/reporting_moderated_mediation_apacuul7.pdf
    • https://static.s123-cdn-static.com/uploads/4483365/normal_5ff9080d6ab1e.pdf
    • http://purpless.vip/26326656644j558f.pdf
    • https://cdn-cms.f-static.net/uploads/4500668/normal_6036045be6ddb.pdf
    • https://cdn-cms.f-static.net/uploads/4477183/normal_60289474b1906.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zelejiv.epizy.com/pigawozisinuleraroredu.pdf
    • https://s3.amazonaws.com/jenisozazewubo/carls_sims_4_cheats_guide.pdf
    • http://vagafalim.rf.gd/puligureb.pdf
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_71827403f21c4927b6339ae548ecb8bd.pdf?index=true
    • https://89511c73-251b-4bee-a1a5-5f4bd4863124.filesusr.com/ugd/f24cb8_5fc016ddd3284235afcebee39755f09b.pdf?index=true
    • https://e1bd05e7-a2ed-43df-b5fc-9bc8ee0b1a84.filesusr.com/ugd/08acf3_0e57336166644efea4a9d98c4c98ad36.pdf?index=true
    • http://wedojixote.rf.gd/tejufizoruribawirudekujev.pdf
    • https://s3.amazonaws.com/vosimalume/91386934657.pdf
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_4d84631b52654aa882161a77b0e51588.pdf?index=true
    • https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_b2b4f139db75489e9c8d264009fbc7f1.pdf?index=true
    • https://2a009ac4-5770-49f2-ae16-4ce107243443.filesusr.com/ugd/59deca_b0f6117d556c423da354c49a57a7f541.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_off0000fa67.bin
b2bea288cee28b445cf19142597c97bfb5530fe1262a1681cdc236a1bf4acef2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA67 5648 bytes
font_01_sfnt_off00010da0.bin
a01deaa15030aba892f885d8a2a919a25192803bd05892423d3bd883ab238e42
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA0 11148 bytes