Malicious PDF — malware analysis report

Static analysis result for SHA-256 e97d5682adde836a…

MALICIOUS

PDF

78.3 KB Created: 2021-03-19 13:51:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de6a9855ab82f1f4a9a605d49a029072 SHA-1: 9caf9287a2b79c3d4c6299699ccfaa7b12faa61f SHA-256: e97d5682adde836a8fbfa9c487bd6bc9442af11438eba1cb60d952292538819a
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating it is likely a phishing lure. It contains numerous embedded URLs, with a primary malicious URL being https://midufefew.ru/strik?utm_term=what+is+the+blood+test+called+for+crp, which is presented as a search result for a medical query. The document's structure and embedded links suggest an attempt to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=what+is+the+blood+test+called+for+crp
    • http://jopagozopive.medianewsonline.com/sample_safety_message_to_employees.pdf
    • http://wepovak.iblogger.org/fudifavabonegosok.pdf
    • http://milanomodaitaly.site/todebakejekaf6d3ol.pdf
    • http://gazzsheff.xyz/stickman_destruction_4_annihilation_apk_modnn33s.pdf
    • http://ruxuzosok.mywebcommunity.org/search_images_from_phone_gallery_on_google.pdf
    • http://lazadacostumercenter.com/what_does_iowa_health_and_wellness_plan_cover2suhv.pdf
    • http://xajoraxi.22web.org/dodidimemagavafevobefujo.pdf
    • http://fasoxuxesatilu.sportsontheweb.net/85128950023.pdf
    • https://cdn.sqhk.co/rosivapixove/gXCOzH0/sticker_maker_video_apk.pdf
    • https://cdn.sqhk.co/riroxale/jeifhd7/fefelobiwojozugigepa.pdf
    • https://cdn.sqhk.co/nuzitomizaj/MEgdVJL/nitivuxerofekebewijito.pdf
    • http://bodipok.getenjoyment.net/60181535601.pdf
    • https://cdn.sqhk.co/sosobita/njEgjbG/wuvoletoni.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3f27f9c7-7345-4686-a7c9-a36cf53ed803/2012_kenworth_t800_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/bec5ea29-8f9a-41c6-a06c-6f26822fc257/totadezipobaju.pdf
    • http://vomewudige.atwebpages.com/kijepejizozisezanob.pdf
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_9de910d9539f4c1c9708c08e38df99a0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8cd98df3-3eff-4b44-9cd0-5ae9213e2ef9/firozigejurofufan.pdf
    • https://2cc3dcad-61c1-4442-8662-ca5be7cd8672.filesusr.com/ugd/71b93f_141d748665914c98a496e4cf655a6989.pdf?index=true
    • http://lowimupedi.epizy.com/hollywood_action_movies_free_2018.pdf
    • https://02f7d751-f0a4-44c7-9eee-55db779bc84a.filesusr.com/ugd/c4f63d_b1491f4f69ac478599003a8457f90d76.pdf?index=true
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_c1adab21cdab4ab4955e52be0f84a3f7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/96276b31-becd-4a1d-b091-507b9dc7963e/panaro.pdf
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_95c866c1dace437cb7b1772e4caed0e5.pdf?index=true
    • http://modunozig.rf.gd/how_to_draw_function_curve_in_excel.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f591.bin
7875da9ebfb0023562d940f424f8eb2f5d9951006d6a96c9250d16150df89984		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF591 5396 bytes
font_01_sfnt_off000107eb.bin
46b1663b678e649e97690c3c3cb9eb5271b94d35d5b9b7891fdf27c1b8da425c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107EB 10448 bytes

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