Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c670424f098854b…

MALICIOUS

PDF

72.9 KB Created: 2021-03-31 13:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1e84f7f7431f338bcc944a2c7236829c SHA-1: bd244f8506be8bea5c429749fd3e607fd3d4d6c5 SHA-256: 7c670424f098854becd1130f5f725564faed2be7a9a8ba6882c1b4ecfdcd7a6c
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or phishing for credentials. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into navigating to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/award?keyword=alphabet+matching+worksheets+for+kindergarten+pdf PDF link annotation
    • http://meroxisawifagu.mygamesonline.org/fallout_4_weapon_mods_xbox_one_2019.pdfIn PDF document text
    • http://suvolupijiro.mygamesonline.org/nigizoxetorasogi.pdfIn PDF document text
    • http://tifoxikutawe.sportsontheweb.net/tabla_de_conversion_fracciones_de_pulgadas_a_milimetros.pdfIn PDF document text
    • http://polikarmonolit.ru/kumiboke2gb28.pdfIn PDF document text
    • https://cdn.sqhk.co/jepivitixiwo/cDWia6c/44959990606.pdfIn PDF document text
    • https://cdn.sqhk.co/kubabulukod/dBhfKih/26190966797.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/ichaWgg/funny_action_hero_names.pdfIn PDF document text
    • https://cdn.sqhk.co/dugubupa/RojjbkD/zuxoburatimo.pdfIn PDF document text
    • http://medicalpracticementor.com/aircraft_design_a_conceptual_approac6wtse.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/37688942607.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/acrobat_reader_online.pdfIn PDF document text
    • https://cdn.sqhk.co/munenetifu/ghijf0U/73470773177.pdfIn PDF document text
    • https://cdn.sqhk.co/laxefotogulo/bjcidgf/facebook_lite_apk_latest_version_uptodown.pdfIn PDF document text
    • http://japavizifovot.22web.org/small_business_management_an_entrepreneur_s_guidebook_8th_edition.pdfIn PDF document text
    • http://webdefilmizle.com/puregupafisubegevimajapam87.pdfIn PDF document text
    • https://cdn.sqhk.co/boxepupovemu/fn4RJdF/lowes_honda_pressure_washer_hose.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/nexobo.pdfIn PDF document text
    • http://derekom.rf.gd/nudefubigojuvegafi.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/51502233712.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/ganonexovipulodopajevegur.pdfIn PDF document text
    • http://mugafazeporose.epizy.com/overeaters_anonymous_food_plan_blue_sheet.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_off0000de0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0D 5856 bytes
SHA-256: d19a372852371c19ece1ba0255d27fe3f1cda68907571947b372bf9ceba6a410
font_01_sfnt_off0000f1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D5 10528 bytes
SHA-256: 28c83ba3725b5e58c68669414f2a34c6e9b9c49459c2b79849674552dde1adf3

Open this report in the interactive analyzer, or submit your own file for analysis.