Malicious PDF — malware analysis report

Static analysis result for SHA-256 091a3ba627bef802…

MALICIOUS

PDF

72.4 KB Created: 2021-02-21 23:40:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7d9e839c9b793dcfec47a519f206fd47 SHA-1: 184d117d310afb67ef048f84b1a7a396a3655579 SHA-256: 091a3ba627bef802fed191d9bc3e3a49d584ede553dff7165d4fa7c7378b2335
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=it%2527s+kind+of+a+funny+story+book+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4446651/normal_5fcb123edb4b5.pdfIn PDF document text
    • https://cdn.sqhk.co/vumusokutil/chejjjg/solar_system_scope_vr.pdfIn PDF document text
    • http://claire-irk.ru/8710001567nlxxh.pdfIn PDF document text
    • https://cdn.sqhk.co/vufebevefo/hyhj0WX/45600327232.pdfIn PDF document text
    • https://cdn.sqhk.co/sonawumi/YyLiihc/jepinitipuganigulila.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/1LgjNic/362384403.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/fZgeDtA/25089531553.pdfIn PDF document text
    • https://cdn.sqhk.co/wukomidekepu/aovUZji/lowakurelupesirugu.pdfIn PDF document text
    • https://cdn.sqhk.co/jufulezamuko/pHhbMgF/85367369951.pdfIn PDF document text
    • http://weex.info/vba_emulator_for_android_apk4dkhv.pdfIn PDF document text
    • http://sarhello.online/41046923701jw3kb.pdfIn PDF document text
    • http://vnds-v.website/ap_studio_art_concentration_questionsnvrh7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449771/normal_5fd892ccc3017.pdfIn PDF document text
    • http://suxiselukex.66ghz.com/action_games_free_apkpure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385635/normal_602213d694d6f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gebogozomusedom.rf.gd/judas_maccabaeus_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/who_is_the_guy_at_the_end_of_50_shades_darker.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/aspect_ratio_changer_android.pdfIn PDF document text
    • http://pezukovurarugor.rf.gd/maze_runner_cast_x_reader_interview.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/blank_timeline_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/online_marksheet_verification_form_haryana_board.pdfIn PDF document text
    • http://kipafiperugava.epizy.com/wixugikadiz.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/comment_convertir_une_page_html_en.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_off0000df17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF17 5280 bytes
SHA-256: 6522a9d09e894f79a2af9b50c32849786d5b0dd76aced7d37dc35f5c488c1c7a
font_01_sfnt_off0000f129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF129 10264 bytes
SHA-256: a51ee311708393ba711cdf917239a63b212ca395c59df8dcdc5aa05838721e4e

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