Malicious PDF — malware analysis report

Static analysis result for SHA-256 735081692db923b9…

MALICIOUS

PDF

87.1 KB Created: 2021-03-06 19:42:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0b0ce98ff93f02de6a7e17896bad8087 SHA-1: 25e3d0310d42b60ed02df8b1a7fb41a46d81422e SHA-256: 735081692db923b9d751530d24a7db81e500d8e0a2a68a6f4d5c162c9bcbd77b
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to the embedded URL, suggesting a lure to a fake search result page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/award?keyword=eventide+timefactor+presets+worship PDF link annotation
    • https://cdn.sqhk.co/solalokazili/fFjihib/14578377717.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368958/normal_602b6e22c9114.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/jutonesofomisabuputezo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449183/normal_5fdba7de828de.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/BhjZghT/domino_game_offline_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pumafuki/giOpgdg/pac_man_costume_party_city.pdfIn PDF document text
    • http://jarevine.mywebcommunity.org/can_i_use_vicks_liquid_in_a_diffuser.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/97462694541.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_603341710b27d.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/15531535294.pdfIn PDF document text
    • https://cdn.sqhk.co/kevovevude/hhbCtL2/crossfire_series_movie_2017.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuzajomugi/jWvXGih/teachers_college_reading_and_writing_project_resources.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/827fc0fc-f8a7-4db7-aeaa-5805924e0525/broken_spears_by_miguel_leon-portilla.pdfIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_cbac4f46a14742e1b27752bc78b583d2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pigolo/best_bike_lock_lockpickinglawyer.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/oxford_dictionary_for_mobile_android.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/morowuvemegazajix.pdfIn PDF document text
    • https://39c3e2ba-dcb8-4bc0-9ed7-0058f02c59d5.filesusr.com/ugd/fd4c29_4a4eaeaeacce4894b08037ec8d281155.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cdac55a-9777-452d-ae05-80077623e57f/87870325700.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/a_tipicidade_formal_da_conduta.pdfIn PDF document text
    • http://kutoxinupuroxo.onlinewebshop.net/visual_display_of_quantitative_information_epub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eec230e-ae20-4555-91e2-686d00ca702d/the_seventh_most_important_thing_book.pdfIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_13b43dd0cff04073abe2a927c0d0304d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/womirofop/vscode_full_version.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_off000117de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DE 5472 bytes
SHA-256: f3ddb9aaa771682b46040488c35bc37361d35f2fcf93048e1bfea9614c28aebb
font_01_sfnt_off00012a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6B 10764 bytes
SHA-256: 6728159dfa1c3995405c6b2443f7c35995e6d28670612e3751ddcb45d9fc942b