Malicious PDF — malware analysis report

Static analysis result for SHA-256 c51bc6f6f8b99b10…

MALICIOUS

PDF

75.8 KB Created: 2021-02-27 18:26:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 38f5830fbf528d34d4a017eaea448721 SHA-1: 66ec563af20f4d9aabeaa95e3168d6d1967aa8d2 SHA-256: c51bc6f6f8b99b10d14bbfb7b7a296eac9c8bef6c3b1af7bc08bc0d1dc5653b3
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://gimoguvi.ru/award?keyword=where+is+the+africanized+honey+bee+from PDF link annotation
    • http://securitycheckingbrowservkcom.xyz/les_limites_de_la_sparation_des_pouvoirswcmzr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427313/normal_5fe40ec83d66d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485004/normal_60336abfe2dc2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374954/normal_5fc7f557108fd.pdfIn PDF document text
    • https://cdn.sqhk.co/gatidixon/bEthjgi/digi_sport_3_hungary_watch_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417206/normal_6014ac99ed522.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/is_the_aisin_transmission_good.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366366/normal_5ff9657dd04f5.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/SJmjhf0/nsw_rowing_championships_2020_live_stream.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480904/normal_5fcb8f2ba846c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450426/normal_5fde9f690bd33.pdfIn PDF document text
    • http://contentmedialiteracy.com/shopify_app_development9yval.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375509/normal_600ce1b6b192f.pdfIn PDF document text
    • http://bella24.xyz/roadside_stand_poem9o746.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/farberware_food_processor_not_working.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ecb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB3 5532 bytes
SHA-256: 62a888cffe470ca246418926fb2d39adb6a88c79f5b12942ba54eac836a5ef7e
font_01_sfnt_off0000ff76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF76 10196 bytes
SHA-256: 86427bfc78fa29901941e5e4eb25e528e52f25e9d33cea0155526433beceef33