Malicious PDF — malware analysis report

Static analysis result for SHA-256 14591d51cd58e99e…

MALICIOUS

PDF

75.3 KB Created: 2021-03-12 12:39:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d3876875e1df5d369272e65ecf32fa3 SHA-1: 9d3296538c18bd4de54b068403ed20e2251c2a63 SHA-256: 14591d51cd58e99e004c40d9dff637943d4f254c2f57b42e49e445677ddf0af2
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to product instructions, aiming to trick the user into visiting the malicious 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://zajinet.ru/wix?keyword=polar+ft4+heart+rate+monitor+instructions
    • https://cdn-cms.f-static.net/uploads/4402478/normal_600fe09959716.pdf
    • https://cdn.sqhk.co/nubalevuvem/Digyo5F/52038078694.pdf
    • http://gefaveje.22web.org/tawawol.pdf
    • http://fonujameritules.getenjoyment.net/hasbro_games_electronic_battleship_advanced_mission_instructions.pdf
    • https://cdn.sqhk.co/zikufivol/bhaBzgh/retro_garage_car_mechanic_simulator_mod_apk_download.pdf
    • http://dewobazul.22web.org/63201086624.pdf
    • https://cdn-cms.f-static.net/uploads/4393779/normal_604845a5481f5.pdf
    • http://wotaxatumumodok.sportsontheweb.net/67634889452.pdf
    • https://cdn.sqhk.co/baresupujar/fjfgj1c/farm_heroes_super_saga_helpers.pdf
    • http://winoxolupuvil.getenjoyment.net/92533711775.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zepogofeto.epizy.com/woolworths_online_application_form.pdf
    • http://gavasirobodi.rf.gd/99285153494.pdf
    • http://vemusimovoxodan.rf.gd/17148290507.pdf
    • http://lapabogi.rf.gd/164_bus_schedule_nj_transit.pdf
    • https://uploads.strikinglycdn.com/files/eb3d39f4-5f2b-4bbd-9940-7a285eed5b92/26310250373.pdf
    • https://uploads.strikinglycdn.com/files/dd170acf-526c-4af1-8b06-611e51dce44f/50th_law_robert_greene_quotes.pdf
    • https://uploads.strikinglycdn.com/files/22c851ec-fab4-4eca-b972-2881279df63b/68633325893.pdf
    • http://kimatun.epizy.com/charbroil_performance_340_anmeldelser.pdf
    • http://denakisewir.epizy.com/twinkle_khanna_song.pdf
    • http://mifojizu.myartsonline.com/2_digit_subtraction_with_and_without_regrouping_worksheets_2nd_grade.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_off0000eb5b.bin
dfc43ae5d2272250efb238cfb43c2966f14db9a347dd700ca918716c967989bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5B 5208 bytes
font_01_sfnt_off0000fcf1.bin
4d8b49c5f6b1c7ee2f5b5ca65c1957df4b8dcfec43b6447f4cdfa91d6641b25c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF1 10248 bytes