Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ede330475d1389e…

MALICIOUS

PDF

80.5 KB Created: 2021-04-08 22:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 93428e44dc2ec8d931225b1d4eb22e4e SHA-1: 2124858664a7a52b6057a93e4b1f11d333e84e7f SHA-256: 1ede330475d1389e7439a19745938f6f2596a088cd4b6402fd28abcc717dce54
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to digital newspapers, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/strik?utm_term=best+device+for+reading+digital+newspapers PDF link annotation
    • http://sallely.xyz/how_to_replace_belt_on_dyson_dc33_vacuumdalbe.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/hcYhdob/sonic_adventure_2_chao_animal_parts.pdfIn PDF document text
    • http://getyourcredit.info/chupke_chupke_movie_480pdx55w.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/biBhbgf/skin_editor_for_minecraft_pe_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/hgPcDPu/47255567362.pdfIn PDF document text
    • http://zoomita.space/sag_modified_low_budget_ratesh983y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469645/normal_60200e9943e73.pdfIn PDF document text
    • http://limecash.xyz/video_player_for_android_phone_free_download3ktmn.pdfIn PDF document text
    • http://vesajob.getenjoyment.net/drilling_and_blasting_equipment.pdfIn PDF document text
    • http://hempmap.ru/marketing_an_introduction_14th_editionbyw4k.pdfIn PDF document text
    • http://gemofesane.medianewsonline.com/what_is_a_monastic_town.pdfIn PDF document text
    • http://olx-delivery.cc/is_the_us_stock_market_open_on_july_3_2020xbzea.pdfIn PDF document text
    • http://reactivascotia2020.com/45422400159d1lfx.pdfIn PDF document text
    • http://kernig.store/wabopasakulodakeg5kl3.pdfIn PDF document text
    • http://semengergel.ru/gta_5_crack_all_missing_files_downlouknxc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387938/normal_602164577c6da.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zefifimagami.epizy.com/94628332397.pdfIn PDF document text
    • http://nujunawefati.epizy.com/poweredge_mx740c.pdfIn PDF document text
    • http://xarigezosuwa.rf.gd/weramepotarekufikekogux.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/how_to_make_a_rocket_stove_from_bricks.pdfIn PDF document text
    • http://zubikexef.rf.gd/sample_inspection_report_format_excel.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_off0000fd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD14 5524 bytes
SHA-256: 7d7dec0c5096429425b8e3e58965cb875c0f68326cd421f92f71c80516d2dcaa
font_01_sfnt_off0001100d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100D 10600 bytes
SHA-256: 31d9636964f7edea9c982111ea1f94edb5eb2e28c704e551bc57c0e0cdb8429a

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