Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34945b4386ea3ad…

MALICIOUS

PDF

76.7 KB Created: 2021-03-18 19:30:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e7a33ff172a8c9b57a89e780b3b34a0f SHA-1: ec91e3fcfea9d5b45a3aa85709cbfa7d1330f930 SHA-256: d34945b4386ea3ad66e228b4edd6ba53d9b288248d9e740c85df3f4f8ec94bce
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a site offering a "full game free", suggesting a phishing or social engineering lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI heuristic suggest it may leverage JavaScript or other embedded content to facilitate the download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/123?utm_term=caesar+4+full+game++free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467030/normal_5fe48eff52364.pdfIn PDF document text
    • https://cdn.sqhk.co/rurokusulos/UZHi7rn/idle_ants_simulator_game_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/nedupugifuka/ijBghii/download_mini_car_racing_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393514/normal_5ff7e3f33ed46.pdfIn PDF document text
    • https://cdn.sqhk.co/detokelixipi/3iiGdJL/xomademovusiw.pdfIn PDF document text
    • https://cdn.sqhk.co/fasegibuniz/jfjf7jb/numevalivowarepopefedufa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482219/normal_603ebb853ddac.pdfIn PDF document text
    • https://cdn.sqhk.co/badexejos/Wdkiihc/redojomisogefeberowulur.pdfIn PDF document text
    • https://cdn.sqhk.co/vubiwete/hzjfuhd/jirunuxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495269/normal_6014901ee333f.pdfIn PDF document text
    • https://cdn.sqhk.co/lufezeralon/hjdidZp/world_live_tv_apk_2018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446259/normal_5fff360f6ed18.pdfIn PDF document text
    • https://cdn.sqhk.co/magatile/lfpLg5J/gcse_maths_worksheets_foundation.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426407/normal_5feec45bd482f.pdfIn PDF document text
    • https://cdn.sqhk.co/vozedolurezu/jyqm8jb/sebobil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414678/normal_5fe32d560bc67.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/a7c15e5f-ecc0-4e6d-a9cc-905b3acdf31d/42648813173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5870111-e8aa-47a2-b93e-d537eeb8ecc8/81033660751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f699e211-f2f4-4000-a341-fb9bed90e9ff/como_aprender_ingles_con_juegos_para_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f2c5a23-a18b-4877-b03e-a8e4e66c7195/peer_gynt_morning_mood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f421a243-2a2b-498b-9c62-2045004de095/65440589580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d75c116-c394-4162-bdd8-e408d701e165/pijagemodemaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32361601-5600-4700-8c53-bda4859812c1/braun_millennium_series_wheelchair_lift_for_sale.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_off0000f032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF032 5080 bytes
SHA-256: 89141ea760ff602262e9d007ea4ccebf88b5a9d2625e9dadac30e64b4b372cec
font_01_sfnt_off00010167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10167 10608 bytes
SHA-256: c872c3d0a39de8e553ae3f6d263564ab4f54b88f305d5d5ca9871d4c74d6e986

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