Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7c04ed148cdf29…

MALICIOUS

PDF

78.7 KB Created: 2021-03-18 03:05:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 01cae585c05a7b623fd79c7a71c36b36 SHA-1: ba54f6d7d04d0a161411f7a1cda68fc3b761ceb6 SHA-256: cd7c04ed148cdf29a44e8506fd028385dbebef42fa9b767624f323cabf4c22cb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to disposable domains, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://nipisod.ru/wix?keyword=southside+high+school+fort+smith PDF link annotation
    • http://ourfanz.com/zojedavevbyyke.pdfIn PDF document text
    • http://nutusugeralinet.mypressonline.com/624087832.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/j6nq3Xf/sp_sport_maxx_050_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/mewixamok/hfiTzjf/wifoluxiditaxitewef.pdfIn PDF document text
    • https://cdn.sqhk.co/tolebilu/ghPgeii/pixel_gun_3d_mod_apk_developer_menu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403533/normal_604f1b362dda6.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/Chgf3if/33194969549.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389358/normal_6044f9f022ee6.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/25TqDii/sony_vegas_pro_14_tutorial_espaol.pdfIn PDF document text
    • http://inscarusa.info/joking_hazard_drinking_game_rulesw4wm0.pdfIn PDF document text
    • http://sodalabs.club/download_oracle_java_jdk_jre_jdk_8ic4fj.pdfIn PDF document text
    • http://shop-profildoors.ru/darwin_origin_of_species_albumb9mju.pdfIn PDF document text
    • http://sunazeremitiwu.mypressonline.com/oracle_database_pl_sql_language_reference_11g_release_2.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/nijoluzazut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415537/normal_5ff5c6d3c9ae8.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/hbhaAgh/grand_formula_racing_2019_mod_apk_download.pdfIn PDF document text
    • http://morasuxod.getenjoyment.net/piwuzewunuvixo.pdfIn PDF document text
    • https://cdn.sqhk.co/rudugebakivo/ggf6Fig/48783808644.pdfIn PDF document text
    • https://cdn.sqhk.co/komajekolino/jtnjbhh/oddmar_android_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415782/normal_6004e057c06d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447431/normal_5fd1759185582.pdfIn PDF document text
    • http://legko.travel/xixilemujixelajofarip0uxf3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded1d1e0-540c-4b25-b2ec-762f3540ca84/75333455328.pdfIn PDF document text
    • http://fabedidatifi.onlinewebshop.net/tuvuvixip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66bc9f4f-1253-46e1-b699-cf9145aac93e/how_tall_is_hugo_weaving_in_feet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62e0cb12-3026-4231-a452-83276496bb32/betuxekofikozikizutomuv.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_off0000f599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF599 5328 bytes
SHA-256: 13f8277a448259289379187811bc90d436a6fbd2b7a7f21885d2d91b4a6bffac
font_01_sfnt_off00010793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10793 11092 bytes
SHA-256: 5d52333efdc5bae439d15f7143b82103b5e8058559a29d32dd6f15c6c1d80720

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