Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb2b6ffc93bcdcc…

MALICIOUS

PDF

78.3 KB Created: 2021-03-29 11:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5183a11acc0f65f1b5c0175e067d7e72 SHA-1: 85f1d6e9e5442bcf89baf84b11bf586e2a51c832 SHA-256: 9cb2b6ffc93bcdcc3b20485fb96811eae9d7106f319f1e11b08b5e83d509c745
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a seed-phrase/secret-recovery lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://midufefew.ru/wix?keyword=active+directory+certificate+services+ports PDF link annotation
    • https://cdn.sqhk.co/sidamebo/iihj0MM/pepinukeditu.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/ajfr051/balance_sheet_ratio_analysis_ppt.pdfIn PDF document text
    • http://pshcomonhere.xyz/how_to_reset_the_playstation_gold_headsetvbcpj.pdfIn PDF document text
    • https://cdn.sqhk.co/nifijagik/cs6i4fC/nail_biting_meaning_medical.pdfIn PDF document text
    • https://cdn.sqhk.co/modesarox/3jipSCZ/like_a_boss_songs_list.pdfIn PDF document text
    • http://tetuzat.22web.org/degunujaruluf.pdfIn PDF document text
    • http://zifijovimijita.iblogger.org/who_makes_bolens_riding_mowers.pdfIn PDF document text
    • https://cdn.sqhk.co/baxafapunubi/icvhhie/dsm_personality_disorders.pdfIn PDF document text
    • https://cdn.sqhk.co/jasolizilaf/aja5ViI/88218540147.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/3ibXLij/saserepu.pdfIn PDF document text
    • http://profapp.pro/90848776307lcxln.pdfIn PDF document text
    • https://cdn.sqhk.co/fifotadog/M7ieZbM/dictador_rum_20_year_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/90b03a8f-c481-42bf-a135-39d43f22baea/how_to_manage_change_effectively.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ae6f9b6-023f-43a3-b2bf-afa210c68fa6/what_are_the_basic_c_programs.pdfIn PDF document text
    • http://pekinomigaw.epizy.com/libewusital.pdfIn PDF document text
    • http://nadanopo.rf.gd/icao_annex_6_part_2.pdfIn PDF document text
    • http://xonefepuvimami.epizy.com/free_fire_advanced_server_apk_pure.pdfIn PDF document text
    • http://kavisawadafo.epizy.com/gebuwerosaja.pdfIn PDF document text
    • http://vetozidute.rf.gd/closing_stock_in_balance_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70c60f5b-be98-4dd1-8998-75001dc8b887/57690757914.pdfIn PDF document text
    • http://sebuvikibafil.epizy.com/lagu_aku_dan_dirimu_cover_aldhi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF329 5268 bytes
SHA-256: 66806e90a104dafa97001b2969ece2bc1c3740773fe04dd23ccc388e5e9e5e21
font_01_sfnt_off00010538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10538 11296 bytes
SHA-256: 3825959d413ad0d24754576f4b71a5773d0eba967a1604bd05c698069b8a0b0a

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