Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae05fc965466126…

MALICIOUS

PDF

76.7 KB Created: 2021-03-10 01:20:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b2f4d815a331257b48dca08381fed788 SHA-1: fbaf67fa927966d48e2d477793f2e73b5853c3b1 SHA-256: 8ae05fc965466126e47897bc6fbc9de9261922397314951cef7d07fd7d264d13
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/123?utm_term=kgmu+b.+sc+nursing+online+form PDF link annotation
    • http://rawoxaxevog.mygamesonline.org/a_song_of_ice_and_fire_in_chronological_order.pdfIn PDF document text
    • https://cdn.sqhk.co/daluzowinasu/jg0Shfk/chromecast_built_in_sony_tv_not_working.pdfIn PDF document text
    • http://vawurabel.mygamesonline.org/what_is_benzene_made_out_of.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/7r9if5l/write_the_solar_system_name.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466391/normal_5fc5d177a572d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393752/normal_60099406c4346.pdfIn PDF document text
    • https://cdn.sqhk.co/diratukuz/g9dCi70/anatomy_chart_muscles.pdfIn PDF document text
    • https://cdn.sqhk.co/lulufebexefe/a4ihggP/sampler_dj_online_champeta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450723/normal_6007dacc6348d.pdfIn PDF document text
    • http://jesofafisozosa.iblogger.org/biravegel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pizenusogusu.atwebpages.com/what_are_the_hours_for_covid_testing.pdfIn PDF document text
    • http://madepug.rf.gd/rotisujaku.pdfIn PDF document text
    • http://bezofiwod.rf.gd/sabotixesekadanu.pdfIn PDF document text
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_68d3ac26bf9d49f1a48871f23200144b.pdf?index=trueIn PDF document text
    • http://limufewugewo.rf.gd/audio_video_er_app_for_pc.pdfIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_a1d2b89b634d4f2da1de538afd92e6de.pdf?index=trueIn PDF document text
    • http://pepajefosub.epizy.com/79943035438.pdfIn PDF document text
    • http://biledimetiwen.epizy.com/international_format_landline_number_philippines.pdfIn PDF document text
    • http://fatewazut.epizy.com/81948259081.pdfIn PDF document text
    • https://3dd85f33-233b-4b3c-8e53-142bc8307eec.filesusr.com/ugd/8df890_f44f1b4ef3924654b614c18e6433d652.pdf?index=trueIn PDF document text
    • http://pidazedovag.epizy.com/kubufob.pdfIn PDF document text
    • https://85377554-d84f-42a6-a955-c87f7d5d3d8c.filesusr.com/ugd/dd4472_db9272c5ed0642cb84ff9ca0553447df.pdf?index=trueIn PDF document text
    • https://30cc9e9c-6145-4029-bfdc-d0561bdb3a10.filesusr.com/ugd/0dcf4b_4d46fa1b92894a5f8e81b964a08b89db.pdf?index=trueIn PDF document text
    • http://jimarol.myartsonline.com/lirowofawejuwotolaxopa.pdfIn PDF document text
    • http://bokonejedebi.rf.gd/hallelujah_oh_wonder_piano_sheet_music.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_off0000ed61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED61 5132 bytes
SHA-256: d5400ba57e8ce771f1ea29b9453f9a18587c462d2930259ff49b2c9dc749ad91
font_01_sfnt_off0000fed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED8 11320 bytes
SHA-256: 555098f758e2dfd774e8fc6e8cefcfdca75c44475df79dee49482f6a52487682

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