Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac27290d821658a6…

MALICIOUS

PDF

74.5 KB Created: 2021-02-15 19:44:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fc476908da2ca96a7e7b2e9e0efcbc53 SHA-1: fd7011becdddb1799b4f9fb0f324919534db01e6 SHA-256: ac27290d821658a6bb4fed7ce3e07dcf78011d694428c9d1381771c4c36f2c66
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wix?keyword=ph+lab+activity+answers PDF link annotation
    • https://cdn.sqhk.co/xoripudesew/jIxChiK/ocean_wars_last_ship.pdfIn PDF document text
    • http://dujoxizuzepofom.iblogger.org/certificate_of_achievement_template_psd.pdfIn PDF document text
    • http://zeropium.com/battleship_game_androidutfov.pdfIn PDF document text
    • http://enots.space/towafafigulorovawelobezos2nxc8.pdfIn PDF document text
    • http://litifafoj.iblogger.org/free_remodel_budget_template_excel.pdfIn PDF document text
    • http://xisulekotitis.iblogger.org/red_bus_app_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/xidodaxu/09SIYqM/fojavipenabepetilipunu.pdfIn PDF document text
    • http://minuette.me/free_editor_to_word_converterv5n1z.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/aswrhgx/hornblower_cruises_san_francisco_fleet_week.pdfIn PDF document text
    • http://wabukuxinezu.22web.org/gapej.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxofidipo/tgjGGqz/phoenix_arizona_weather.pdfIn PDF document text
    • http://trickyturkey.com/travel_ban_to_cuba_from_usa_2019cx1no.pdfIn PDF document text
    • http://nokobefisedo.iblogger.org/bigufozofamitakaxejikaz.pdfIn PDF document text
    • https://cdn.sqhk.co/fufeboxeri/puCqhgG/bixifos.pdfIn PDF document text
    • https://cdn.sqhk.co/fezusife/bihhj3O/texare.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/jcjdXio/fishing_life_vest_amazon.pdfIn PDF document text
    • http://gijofabenetawix.66ghz.com/45404740224.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jakipogiwezekam.rf.gd/zesagukonavedekupil.pdfIn PDF document text
    • http://migisopipa.epizy.com/amman_god_tamil_songs_masstamilan.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_off0000da63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA63 4960 bytes
SHA-256: f3d690d073f4b82d882fec2a0ac9a6f5f7f36a70b0be47fc174f482412b6e9d3
font_01_sfnt_off0000eb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3D 10360 bytes
SHA-256: fad42b87354e607922b75a2197c5d1c054185dfa70ea9343a95163db6496e83a
font_02_sfnt_off00010e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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