Malicious PDF — malware analysis report

Static analysis result for SHA-256 c89de7ce408142c8…

MALICIOUS

PDF

80.9 KB Created: 2021-03-14 15:48:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 53435b7017a01e6473df835b76f3c6bb SHA-1: a8fab8e5d3ac3041da7f01acc21340ec457beeca SHA-256: c89de7ce408142c8e74c6da2626c8135447c167d469e482d3b6c4a2d37ce216c
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, many of which are part of a link farm hosted on disposable domains, indicating a probable phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://fokemale.ru/strik?utm_term=golden+song+season+3+ep11 PDF link annotation
    • http://choosemadam.site/94836629766emsa0.pdfIn PDF document text
    • https://cdn.sqhk.co/wokiwife/dhgjiqW/30559915014.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/jdZVcic/kogetet.pdfIn PDF document text
    • https://cdn.sqhk.co/wemulekojex/jicyjaP/fegakifedu.pdfIn PDF document text
    • https://cdn.sqhk.co/wifuponi/hnY1ijW/office_dress_up_for_halloween.pdfIn PDF document text
    • http://limevekobo.iblogger.org/c._a._t._s_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutesilo/fWp9KaZ/pufitalafu.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/vhfjcgf/shooting_targets_steel.pdfIn PDF document text
    • https://cdn.sqhk.co/lisesemafo/hdAGjdq/mudutetevavodikefil.pdfIn PDF document text
    • https://cdn.sqhk.co/widafopaj/hcUiiwM/idle_ants_hacked_apk.pdfIn PDF document text
    • http://italywow.pro/us_fda_guidelines_for_analytical_method_validationqr8lw.pdfIn PDF document text
    • https://cdn.sqhk.co/zidezofa/cjcha9z/famodupebunotinokiv.pdfIn PDF document text
    • http://cheatyou.site/where_is_the_shear_pin_located_on_a_snowblower1ewwy.pdfIn PDF document text
    • http://jekiroxawuto.iblogger.org/minecraft_bsl_shaders_1._12._2.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/ChbJDJL/basket_ideas_for_boyfriend_birthday.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/riajhwX/mojopesedot.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/dnCgfha/pc_building_simulator_online_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/zifakepavax/bihjf9y/59032757850.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/mjbjd48/wipamefigakuzad.pdfIn PDF document text
    • https://cdn.sqhk.co/dopuwene/ZqToZxu/53887484767.pdfIn PDF document text
    • https://cdn.sqhk.co/mexovaru/AMcUIjc/police_city_motorbike_rider_game.pdfIn PDF document text
    • http://pufopiguzelefe.22web.org/36930550732.pdfIn PDF document text
    • https://cdn.sqhk.co/xusovatovu/jEnzibo/bizadejepobifigisejeliguk.pdfIn PDF document text
    • https://cdn.sqhk.co/kibizatududo/QtQhcjb/dictionary_python_3_values.pdfIn PDF document text
    • http://rating-bookmaker.ru/menu_planning_template_with_shopping_list7pupw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zikenonuto.epizy.com/pagaxesolubivuvizim.pdfIn PDF document text
    • http://getozareburi.rf.gd/16315272283.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD70 5280 bytes
SHA-256: 0e265e56c428c22d3dd6b5de45fc9b01dfd7dac86aefff91f38c344bc41e0234
font_01_sfnt_off00010f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F84 10868 bytes
SHA-256: 5a1a7002dd8417f7eb5b78809933f2d89e6f3c8192cc85b2fd0e93293c7dfc41

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