Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06ac84b04ead581…

MALICIOUS

PDF

80.5 KB Created: 2021-05-18 17:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e38181d4f54ed9d8cb9e4b34c7f31f96 SHA-1: 2593af08de7bdb9b42a778813e913ba7a7a632cf SHA-256: e06ac84b04ead5815999e91ec29a8c06c329704d227de051c3fe6c105ce19918
134 Risk Score

Malware Insights

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

The PDF file contains multiple external URIs, with one specifically pointing to a URL that appears to be a lure for downloading a modded game application. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kuzutuzo.ru/strik?utm_term=forge+of+empires+mod+apk+unlimited+diamonds+2020 PDF link annotation
    • http://togurebuk.66ghz.com/castle_crush_mod_apk_rexdl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387037/normal_601dca621e1e1.pdfIn PDF document text
    • http://zawuruliwisevo.iblogger.org/statistical_quality_control_a_modern_introduction_6th_edition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488336/normal_601b7876f3a1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403556/normal_600e28cf6f8fd.pdfIn PDF document text
    • http://tadinos.22web.org/remington_700_action_truing.pdfIn PDF document text
    • http://gabofovopajojo.iblogger.org/punirab.pdfIn PDF document text
    • http://nukisekafuleda.22web.org/bls_for_healthcare_providers_instructor_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467003/normal_5ff947132362c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dodupubi.epizy.com/google_annual_report_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/47558864234.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/jitawebotenuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cd0ac73-2547-485a-a9f1-d8107bf64c4b/how_to_adjust_aimpoint_micro.pdfIn PDF document text
    • http://fukevitadej.epizy.com/gotopituzeda.pdfIn PDF document text
    • http://gonesolipekivin.rf.gd/sororofufesok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73847832-f264-42b2-9776-ee96153fcc52/90225852887.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/rizol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1789e79-5ac9-4602-90c0-3a3457994867/ziweva.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/pioneer_dxt-2369ub_clock_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d68875c-d712-4101-8585-ac6bba541a05/26356588365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0828313-4626-48cf-ad9f-e201eeff0b32/susili.pdfIn PDF document text
    • http://wuzuvulas.epizy.com/42148309858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca2990a7-d0c8-415e-9c18-74bdbea949cd/tamesekixutuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/643cbca1-b737-4f19-aa24-9b9f70ed7518/twilight_2009_dual_audio_eng_hindi_1080p_download.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/google_adsense_apkmirror.pdfIn PDF document text
    • http://gilovimarej.epizy.com/rugalewusixojebozotasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d26a2829-678c-4b3f-b8a5-73030117025c/nespresso_uk_offers.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_off0000fb21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB21 5656 bytes
SHA-256: 5cbb101e3b28b8c1db8585d596c2824bbf20c0edafd76d3a6b98a75536301ca7
font_01_sfnt_off00010e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E59 10952 bytes
SHA-256: 0ed8e157039e06e32cc755112ea829038261ee9d1abeb8965dfb6e07ed5ff0fa