Malicious PDF — malware analysis report

Static analysis result for SHA-256 df9038239165658b…

MALICIOUS

PDF

81.7 KB Created: 2021-06-01 08:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7769184f85f558885f2c38de82704188 SHA-1: c8110a662bd58e98156e1cf4e505a96266e4327a SHA-256: df9038239165658b352b57057170331d9009b35d5f5439f413b72666b35fcaca
134 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The presence of a link farm and a download button lure suggests a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and embedded URIs indicate it's designed to redirect users to malicious content, likely for payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jacksth.ru/123?utm_term=trend+analysis+report+example PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481839/normal_600db10ba588a.pdfIn PDF document text
    • https://kabapavubume.weebly.com/uploads/1/3/4/7/134742816/tuvamidula-durefelafix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446379/normal_6049ca754f8da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465393/normal_606d604d5472b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383918/normal_605059c9997ed.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4502248/normal_60b06b747cd81.pdfIn PDF document text
    • https://selemuja.weebly.com/uploads/1/3/4/8/134893326/4b43b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404523/normal_5fded590c0718.pdfIn PDF document text
    • https://jutisopi.weebly.com/uploads/1/3/4/7/134775863/rurujekojevoziwanima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_604e99aa5d116.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/11bad140-1954-442f-b7d0-6ba972831688/flower_of_life_mandala_meaning.pdfIn PDF document text
    • http://gulisapil.pbworks.com/f/notice_technique_frisquet_gazliner_23_kw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba071977-0b55-4a1a-8781-002706e9165a/once_a_runner_book.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/f/rufulalironomim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb735ca1-6c57-4465-b9c6-23c7c2f61a89/5406421111.pdfIn PDF document text
    • http://bilabegape.pbworks.com/f/what_does_the_6_of_wands_mean_in_a_love_reading.pdfIn PDF document text
    • http://mapijakemifo.pbworks.com/f/pasos_para_realizar_un_algoritmo_en_programacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dafb410f-1734-4756-9e73-f15016230827/how_to_type_an_alpha_symbol_on_mac.pdfIn PDF document text
    • http://mefijunov.pbworks.com/w/file/fetch/144414921/91451976792.pdfIn PDF document text
    • http://negaboxa.pbworks.com/w/file/fetch/144447702/zewijas.pdfIn PDF document text
    • http://nefusim.pbworks.com/f/pimegofikuzuditun.pdfIn PDF document text
    • http://zufiwuz.pbworks.com/f/download_firmware_wireless-n_wifi_repeater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f8ffb3f-3748-40ef-a246-f8d1a7603ece/95732342022.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C6 5012 bytes
SHA-256: 6d4fb48fa1770c729c962e7e1a9272564d60171c74adfb748628b0ecdcbaef2f
font_01_sfnt_off000104bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BC 11340 bytes
SHA-256: 7243b49877b30a8a1530b7c8087497c56772d963474395e336b280ce1e434875
font_02_sfnt_off00012b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361