Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea0439f8659c842…

MALICIOUS

PDF

72.2 KB Created: 2021-02-08 15:16:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4e788acf716b8a2cdd2ed58405841f0e SHA-1: 3e511ebe0749c73f05b0de438cdb07e1d2cccd95 SHA-256: dea0439f8659c8426d19a649af190747954051525846757f5063135ece817655
176 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://leonvi.ru/wb?keyword=figures%20of%20speech%20worksheet%20for%20grade%205 PDF link annotation
    • http://front-glass.website/clash_royale_quest_chest_cycle_trackerrk9nf.pdfIn PDF document text
    • http://f1l3download.site/curling_bonspiel_draw_templatesl5ym6.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/jbgdzjc/buzzer_beater_manga_oku.pdfIn PDF document text
    • http://stonersfranchise.com/love_breakup_video_songs_teluguv09ql.pdfIn PDF document text
    • https://cdn.sqhk.co/rivitovolu/fjagdji/hustle_castle_hacks_2020.pdfIn PDF document text
    • http://magic-spring.com/28097428202iuo70.pdfIn PDF document text
    • https://cdn.sqhk.co/bowevuva/ihgjwKN/29974957879.pdfIn PDF document text
    • https://cdn.sqhk.co/xolafunodo/egejjig/homeroom_to_go_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.coIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/donake/schneider_altistart_48_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/bahubali_2_movie_tamil_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/inventor_sheet_metal_flange_tutorial.pdfIn macro / runtime command snippet
    • https://s3.amazonaws.com/zuguvoxoki/chancery_guide_hearing_bundles.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/92225207651.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/autodesk_maya_2019_book.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/49898484626.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_off0000ddec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEC 5620 bytes
SHA-256: d3e0b6ef439c48fdb5733ac3e025b5d53f77dec161502220d8d20399fa92877f
font_01_sfnt_off0000f126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF126 10236 bytes
SHA-256: 6932d5cb7257064f832b527366cdd2099696ab4ce9ef9a97074dde41a014f1c2

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