Malicious PDF — malware analysis report

Static analysis result for SHA-256 7159f7ed1ee20a6e…

MALICIOUS

PDF

119.8 KB Created: 2021-05-01 18:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: eccb785892ea114ffbdf46a9649252e8 SHA-1: aaab2ead4626595aece511461d8b4ee51166d116 SHA-256: 7159f7ed1ee20a6efe4e900f5f7a0f4e98c8b6e175c6cf2ad05d6aeb58f69c02
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a specific URL related to an in-game item, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely involving the exploitation of PDF vulnerabilities or social engineering to redirect users to malicious sites.

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://jumiwimov.ru/strik?utm_term=how+to+get+the+bolt+action+rifle+rdr2+early PDF link annotation
    • http://newoxoxi.mywebcommunity.org/alif_novel_complete.pdfIn PDF document text
    • http://intekzafast.online/class_valuation_appraisal_phone_number6fqsi.pdfIn PDF document text
    • http://krokoboko3.xyz/nasavoviduko40bub.pdfIn PDF document text
    • http://lorezagosuvese.scienceontheweb.net/sterilization_of_culture_media.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/why_did_finnick_leave_beetee.pdfIn PDF document text
    • https://potezevaledu.weebly.com/uploads/1/3/1/4/131406960/2139928.pdfIn PDF document text
    • https://sozagigojo.weebly.com/uploads/1/3/1/4/131454883/5146478.pdfIn PDF document text
    • https://maninuwag.weebly.com/uploads/1/3/4/5/134577581/nuduvepogisev-diwuzuzor-rowizotevave.pdfIn PDF document text
    • https://buzomuzugagi.weebly.com/uploads/1/3/4/3/134313884/xunazabevu.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://kavakedego.scienceontheweb.net/pdf_audio_reader_app_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411682/normal_605672f2c02c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366359/normal_5ffa040699c26.pdfIn PDF document text
    • http://dimopun.mywebcommunity.org/jenn_air_convection_oven_how_to_use.pdfIn PDF document text
    • https://notaxivarem.weebly.com/uploads/1/3/4/6/134633458/7875049.pdfIn PDF document text
    • http://titanof-filtr.ru/whirlpool_duet_steam_dryer_does_not_workiklex.pdfIn PDF document text
    • http://povar2020.site/how_to_use_staedtler_calligraphy_markers7827a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gajutar.onlinewebshop.net/applied_physics_ak_jha.pdfIn PDF document text
    • http://xisuwujilaxemer.myartsonline.com/29935538051.pdfIn PDF document text
    • http://mulapoxe.onlinewebshop.net/tutorial_aspen_plus_espaol.pdfIn PDF document text
    • http://fidegaf.atwebpages.com/xokaledeg.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_off0001938a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1938A 5532 bytes
SHA-256: 93178db512291f15194be36b5b9476b565ab85e37940ba620c76e5c680f699ce
font_01_sfnt_off0001a66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A66C 13212 bytes
SHA-256: d7b44fc50390fdbf6a10c9fa6084e6abefd4a108d258d78acb164e4423dbe73f

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