Malicious PDF — malware analysis report

Static analysis result for SHA-256 e25a991e8ea306a2…

MALICIOUS

PDF

74.0 KB Created: 2021-02-21 15:23:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a03fda7796dea9df1fbe432ac71ef3fe SHA-1: 88ab62c9b3933a8ec8619139db115a2d8277fded SHA-256: e25a991e8ea306a2e92eced01cd46a498ded78b2695861909d6802303fc1bc70
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, a common tactic for phishing or scam operations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://leonvi.ru/strik?utm_term=how+to+calculate+long+run+average+total+cost+curve PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4473640/normal_5fecafa7238ac.pdfIn PDF document text
    • http://watertea.space/92713507133385bx.pdfIn PDF document text
    • http://leopards.space/megemunamokodagk6sm2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467007/normal_60017fb3aba87.pdfIn PDF document text
    • http://appletopshop.ru/general_dynamics_information_technology_stocknje77.pdfIn PDF document text
    • http://shop-onlain.fun/totally_accurate_battle_simulator_free_download_apk_pculuut.pdfIn PDF document text
    • https://cdn.sqhk.co/bamosabubesi/bRjhVha/marvin_gaye_greatest_songs.pdfIn PDF document text
    • http://creampiepow.club/admission_form_of_sainik_school_tilaiyaz348c.pdfIn PDF document text
    • https://cdn.sqhk.co/divojimo/P6UicDD/bubble_dragon_game_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xiladuxe/jfE8iij/64357878739.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/jnAjiIt/83330514023.pdfIn PDF document text
    • https://cdn.sqhk.co/gisepavuv/glW9L1K/basketball_legends_halloween_unblocked_games_66.pdfIn PDF document text
    • https://cdn.sqhk.co/zamodozitip/gjbdm27/82762039512.pdfIn PDF document text
    • http://kolomata.ru/what_is_the_meaning_of_accommodation_bill_of_exchange949m4.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/dibCibG/skirball_gift_shop.pdfIn PDF document text
    • https://cdn.sqhk.co/bezakebijuk/xYZIhhS/call_blocker_app_download_for_ipad.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/bIZtgcf/kufisuforag.pdfIn PDF document text
    • https://cdn.sqhk.co/zodavujera/jtmb0Vi/sibikij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BA 5080 bytes
SHA-256: 87c003c72fbb575fe292fe9d85cb77b67856bc943526a910d028ded7c91a1b00
font_01_sfnt_off0000f62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62A 10640 bytes
SHA-256: 685151588fe66671900b06dd4e7274272746591121086376ba21a16dd2995aa1

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