Malicious PDF — malware analysis report

Static analysis result for SHA-256 865d4b954709600f…

MALICIOUS

PDF

72.3 KB Created: 2021-02-16 02:46:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a52cf01a968bb52ac9b9f71e895845a8 SHA-1: f7a805e72d75057bf1cbced86ccba57efd8984cd SHA-256: 865d4b954709600fd93acaddda41eebd935f47ecf4d374ae0ed8d6a53bbbf531
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document uses a lure related to video game cheat codes to disguise its malicious intent. It contains a large number of embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/strik?utm_term=cheat+codes+for+gta+5+for+ps3+money PDF link annotation
    • https://cdn.sqhk.co/dabozijide/CpJidic/xodejalixevi.pdfIn PDF document text
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/rewaron.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimanujage/hfgg4gg/36603161696.pdfIn PDF document text
    • http://theplafond.xyz/pro_engine_blueprintingqis55.pdfIn PDF document text
    • http://5gusevshop.space/good_boys_google_docs8k00t.pdfIn PDF document text
    • https://zuwasaroniw.weebly.com/uploads/1/3/1/3/131380739/6196157.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369765/normal_602abd97e3342.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/eSNKjdr/lawedazulunujatitazek.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/b8gcjan/free_photo_collage_maker_for_desktop.pdfIn PDF document text
    • http://xumegexujarev.22web.org/after_anna_todd_book_online.pdfIn PDF document text
    • http://remontlegko.info/eso_imperial_city_vet_guide4gily.pdfIn PDF document text
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/kekagopile.pdfIn PDF document text
    • https://xuwogojike.weebly.com/uploads/1/3/1/3/131380868/xokonegigetaf.pdfIn PDF document text
    • http://helpcontactform.com/lapitojotonazezogutffct2.pdfIn PDF document text
    • https://lokeduvedip.weebly.com/uploads/1/3/4/8/134885922/vagil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xelidamos.epizy.com/uos_challan_form_for_admission.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/pewexofolatenuba.pdfIn PDF document text
    • http://vobisobopimab.epizy.com/crystal_report_13._0._14.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/acr_form_education_department_punjab_pakistan.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/61149480401.pdfIn PDF document text
    • http://julivaradisakit.rf.gd/titisirojonavofovikag.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_off0000dcbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBB 5832 bytes
SHA-256: f58a5a2309c697486bc275f3b312a4862e6ffe0aae338c860ef88f5f906288fb
font_01_sfnt_off0000f070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF070 10348 bytes
SHA-256: 72b6010a6c80a596b6018770b6967fdc38ae6541218194b01c11278ba1b46344

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