Malicious PDF — malware analysis report

Static analysis result for SHA-256 c64b6e3dd347e30e…

MALICIOUS

PDF

73.8 KB Created: 2021-03-10 20:01:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7413fb06534bef2dd36f7b68d16ec8d6 SHA-1: 703ac4847f838c1864f67a3c00ea7357756d4be0 SHA-256: c64b6e3dd347e30e66f0da08c8ec0ec20a2045f12197a115d8b1e413a99537f3
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a suspicious domain, identified by heuristics as an external URI and flagged by a machine learning classifier. ClamAV also detected it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to news reporting, consistent with phishing tactics.

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://nipisod.ru/123?utm_term=heavy+rains+lash+mumbai+report+writing
    • https://cdn.sqhk.co/pubodegosog/jfDjjcx/tujiberusu.pdf
    • http://phrensy.co/82837997560f4d6d.pdf
    • http://vejofewi.iblogger.org/76561538232.pdf
    • http://easterthjg.com/290117342862wr5e.pdf
    • https://cdn-cms.f-static.net/uploads/4485149/normal_5fdb2a09a0ede.pdf
    • http://shopeuro.pro/seagate_blackarmor_nas_440_420_software6trd2.pdf
    • https://cdn.sqhk.co/satidaruxami/gc0jiIH/final_fantasy_7_walkthrough_wutai.pdf
    • https://static.s123-cdn-static.com/uploads/4470972/normal_5ff6a2e2e400e.pdf
    • https://cdn-cms.f-static.net/uploads/4495395/normal_601a0a7b00c94.pdf
    • https://cdn.sqhk.co/gepeduvo/gEijhas/hmrc_vat_address_change.pdf
    • https://cdn-cms.f-static.net/uploads/4476282/normal_602f24d164804.pdf
    • https://cdn.sqhk.co/mezadisedud/h94txF8/ice_rage_hockey_multiplayer_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wotodedaruzuk/batalimavosofoju.pdf
    • https://s3.amazonaws.com/nitajosasa/xunuji.pdf
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_f0a3847fef8c48bd8cc6372250fb4a71.pdf?index=true
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_f02052433b664905aa91b5ed0359ce22.pdf?index=true
    • http://kibomopog.rf.gd/4483113863.pdf
    • http://renubinivudeti.epizy.com/90322798793.pdf
    • https://1261df91-4e32-40b2-8b8a-4050d3c54cbb.filesusr.com/ugd/df69c1_2b724ab4aa8d46029b466f17a385ec1f.pdf?index=true
    • https://s3.amazonaws.com/radubozufiwo/dreamstation_auto_bipap_provider_manual.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_off0000e122.bin
97cebf57d75565bdabf034d9d4262179aaabb6008ff94f04427c59e9a2e967bd
pdf-font-stream PDF embedded font (sfnt) at offset 0xE122 5588 bytes
font_01_sfnt_off0000f40d.bin
6b25b6f40e91d646225ad312932198537aaedb37d9134e23c5c6ae6a4933547b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF40D 11172 bytes