Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30aa56fdd96af59…

MALICIOUS

PDF

87.6 KB Created: 2021-03-25 10:37:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fa3aac28ecfac7c7c4bba38c46b97cd0 SHA-1: d81c084abcb4006cd7c741160471e350eefeea4a SHA-256: e30aa56fdd96af59794e2286601e123fd54116cb62a0d2381c61ba7633537a38
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a likely attempt to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=asus+proart+pa248qv+24.1 PDF link annotation
    • https://cdn.sqhk.co/gabixeme/ogfSrD4/jaxikaduxipo.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamozomeb/Hieibgj/ladazilatujoburifevemades.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/jgcHDhe/pewdiepie_merch_dbrand.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvapipitol/ROUKAJk/floppy_birb_flying_sloppy_bird_game.pdfIn PDF document text
    • http://opensol.xyz/title_page_template_latex5dira.pdfIn PDF document text
    • http://eurofamily.pro/how_to_fold_up_a_total_gym_supra_proz7ne1.pdfIn PDF document text
    • http://cmbmarketing.agency/uses_of_computer_for_class_2_worksheet37jns.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/3mijnid/zemibasadak.pdfIn PDF document text
    • http://prizyivnik.ru/how_to_fix_culligan_water_softenertgx9e.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/gSmvHhj/96291951106.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/zhdiIja/war_machines_tank_battle_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/mosepoxik/iiKjhcH/village_city_island_simulation_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/AhgSxFG/litatologuvewefudek.pdfIn PDF document text
    • http://lavkavkusa.store/lijasarsgtxq.pdfIn PDF document text
    • http://xasefosixojoloj.iblogger.org/lewidisupipovanom.pdfIn PDF document text
    • https://cdn.sqhk.co/kelifevaz/39ialEU/26992448910.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kidaxuv.epizy.com/dopujadil.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE970 13704 bytes
SHA-256: 1fa9ed6117d1041aa98de078812d297d73e9bf0eb7ef9e114872f400f8df9427
font_01_sfnt_off000115b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B9 5452 bytes
SHA-256: aa9672ea27f3f1faf9f02e12f4ee474a21ebb7ae7731a4bf870f08002d165de7
font_02_sfnt_off00012872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12872 11972 bytes
SHA-256: ac2d1be3e44093cd7b02414d246835678c209a62ac2e713ccf50c3c526fe6210

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