Malicious PDF — malware analysis report

Static analysis result for SHA-256 dff06ff8ec8ed7e9…

MALICIOUS

PDF

78.4 KB Created: 2021-03-29 01:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f2ebe4404f6cdf4b6989bdb6d52069e SHA-1: 7ed67807c09f2d881f2efa7a32b641a02b2a8f1c SHA-256: dff06ff8ec8ed7e970e90a2fd9b083d608fc7fca13532580ddf6486aa95042b5
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1190 Exploit Public-Facing Application

The sample is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a credential harvesting lure by requesting a one-time code or MFA confirmation. The embedded URL points to a domain associated with phishing activity, suggesting the document is part of a phishing campaign. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to exploit vulnerabilities or trick users into divulging information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://ponafet.ru/123?utm_term=new+version+of+telegram+for+pc
    • http://accueilcmb.com/saxafasosibetafajukemtoxq.pdf
    • http://kosonetibekub.medianewsonline.com/digi_002_rack_firewire.pdf
    • http://russianpatentexpert.com/what_a_purple_cow_drinkl3qy6.pdf
    • http://bikuribowe.22web.org/set_theory_mit.pdf
    • http://maluxevuno.22web.org/case_files_family_medicine_4th.pdf
    • http://azorocheat1.xyz/pifititima1j54z.pdf
    • http://honey-love.ru/xizefedisesetekidixexbikkr.pdf
    • http://smallita.space/92216270010vsapw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zukogi/android_recyclerview_inside_scrollview_example.pdf
    • https://s3.amazonaws.com/wefadep/what_is_the_synonym_of_lethargy.pdf
    • http://dopesesowo.epizy.com/intermatic_ej351_-_programmable_24_hour_security_timer.pdf
    • https://uploads.strikinglycdn.com/files/cd551c64-1a85-4a36-90fd-e505b85220e6/black_boy_richard_wright_francais.pdf
    • http://wurebosuloxu.myartsonline.com/bodybuilding_supplement_plan.pdf
    • http://xizoxenefodage.epizy.com/biopsychosocial_model_of_health_advantages_and_disadvantages.pdf
    • https://s3.amazonaws.com/mokuwanibof/marvel_ultimate_alliance_2_xbox_one.pdf
    • http://furafep.onlinewebshop.net/atheroma_cyst.pdf
    • https://s3.amazonaws.com/nevovumowa/avg_secure_vpn_apk_cracked.pdf
    • https://uploads.strikinglycdn.com/files/17a7cea6-3eba-426a-8acb-a69703b5085b/watchmen_movie_download_in_hindi_300mb_worldfree4u.pdf
    • http://pupagerirawax.myartsonline.com/gutaponixexuwexa.pdf
    • https://s3.amazonaws.com/dudujopixejikug/90188039785.pdf
    • http://xenezipulugiji.atwebpages.com/wordly_wise_3000_book_5_lesson_2_test.pdf
    • https://uploads.strikinglycdn.com/files/504dd1e8-a38c-4b0f-a0d4-522ded0820a6/lg_lp0814wnr_water_full.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_off0000f3f6.bin
f61ada5c00cffd59694e43d4c7b482ecf6844229a37c516ad842de204c0f1461		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F6 5456 bytes
font_01_sfnt_off00010694.bin
4a8ddd1b38abc6c5b7986d0a721b3e6c3da52175cda5f16d8746893a7ee03ed7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10694 11000 bytes

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