Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7fdda3bd44205c7…

MALICIOUS

PDF

75.1 KB Created: 2021-03-28 06:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5041159a2847c6090ad84dad2d47589f SHA-1: 6e959b2988452649ffa6d9a777884105e5b4edf1 SHA-256: c7fdda3bd44205c782f1cc3e38a85340ee17ac90fefc5a0f1cdccee9f0da64f0
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. It contains an embedded URL pointing to 'gimoguvi.ru', which is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to an 'annual report'. No scripts were extracted, but the presence of multiple external URLs indicates a strong intent to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/123?utm_term=hannover+re+annual+report+2014 PDF link annotation
    • https://cdn.sqhk.co/pizokifuxe/hbyNHJK/seed_minecraft_pe_diamond_and_gold.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470399/normal_604ce3f87566e.pdfIn PDF document text
    • https://cdn.sqhk.co/fedugaxoloz/cjaT4wg/elder_scrolls_skyrim_alchemy_leveling_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/JmZjfha/supplement_superstore_weight_loss.pdfIn PDF document text
    • http://tiwilofojifig.sportsontheweb.net/3786860477.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/99494453991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393521/normal_603dec090648d.pdfIn PDF document text
    • http://fezelegafefuv.mywebcommunity.org/innovativeness_definition.pdfIn PDF document text
    • http://nexipufogavajid.getenjoyment.net/zelopexegawapevapim.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/vanatul/remington_1187_20_gauge_tactical_stock.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/free_keynote_templates_minimalist.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/wd_live_tv_custom_firmware_plex.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/dj_album_song_tamil_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c9ebcc0-6acb-492a-988c-18eb4d2e3d1e/intex_pool_filter_pump_leaking.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/doorking_1835_phone_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcd0d290-6981-44b3-8d87-7aa261eec811/zeladefutazojobulaput.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/ablerex_ups_manual.pdfIn PDF document text
    • http://ranitirunom.myartsonline.com/carta_de_alma_ata_1978.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_off0000ea68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA68 5068 bytes
SHA-256: 8dbb3ff86d48c4c3af4cb38d9f14dbfb40ef27b0ebc6932e3be0ecffe22903d2
font_01_sfnt_off0000fbc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC1 10304 bytes
SHA-256: 48e0ad494b706e0e6fea593ffca56f883f7b42b97518e0c1624d6d8686ceb7e0

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