Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccaab6b2aa4ab9b0…

MALICIOUS

PDF

74.3 KB Created: 2021-03-07 16:16:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a6a4e1014ac59704cf7fafbdb1610862 SHA-1: 205dffe28a88185dc0431e573c9600111b5890bc SHA-256: ccaab6b2aa4ab9b0a4a04a24eee646c868b0261cc394c158f6bbdf9c5d9af687
184 Risk Score

Malware Insights

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

This PDF file contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though partially corrupted, suggests a lure related to a "Troy bilt gas edger won't start" to entice users to click the malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=troy+bilt+gas+edger+won%2527t+start In PDF document text
    • https://mewejubakokexal.weebly.com/uploads/1/3/2/6/132681976/joriwinuvavanorasu.pdfIn PDF document text
    • http://pimidemo.iblogger.org/personal_swot_analysis_template_doc.pdfIn PDF document text
    • http://rerubin.space/35581658519cwi75.pdfIn PDF document text
    • https://lopamazaveseku.weebly.com/uploads/1/3/4/6/134643240/medigufoxu-kexudof.pdfIn PDF document text
    • http://zunololanuxigu.sportsontheweb.net/how_to_factory_reset_jbl_flip_2.pdfIn PDF document text
    • https://cdn.sqhk.co/kixikeli/Yggs7qk/31291123804.pdfIn PDF document text
    • http://top-shop-store.website/572192026953tskr.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/giifTFK/marooned_on_an_island.pdfIn PDF document text
    • https://cdn.sqhk.co/balaragu/Wjejejb/shorties_kingdom_3_download.pdfIn PDF document text
    • http://snail-case.store/zovobepukafopotugeronez7nb9m.pdfIn PDF document text
    • http://gozatelaji.22web.org/94347097682.pdfIn PDF document text
    • http://datingdate.site/diarios_de_motocicleta_che_guevara_peliculaps2kj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gobavaduxa.epizy.com/menschen_a1._1_answers.pdfIn PDF document text
    • http://zefixufedinokas.epizy.com/5_love_languages_audiobook_download_free.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/fallout_4_companion_guide_likes.pdfIn PDF document text
    • http://kuwubuvorij.rf.gd/delhi_fire_service_fire_report_online.pdfIn PDF document text
    • http://tagetebaj.rf.gd/boxakewigosipelufifu.pdfIn PDF document text
    • http://gasigigi.rf.gd/computerized_accident_incident_reporting_system.pdfIn PDF document text
    • http://tujatubaniza.epizy.com/sony_trinitron_tv_price.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_off0000e6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E8 5312 bytes
SHA-256: 5c2c39e9de1dda79a05279f7138cbba5c755f5405c53822cec449a921a832089
font_01_sfnt_off0000f923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF923 10208 bytes
SHA-256: bb4fc74b905f4f43955856e803153aa5e0bece706998d5eca547239ce2038559

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