Malicious PDF — malware analysis report

Static analysis result for SHA-256 a76d7dc324d95a7c…

MALICIOUS

PDF

77.4 KB Created: 2021-03-15 12:04:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a053b3fb9ad531c1e8483751d6d4b99e SHA-1: 217307dc4a1859dbddd786bb3223c4f00f994759 SHA-256: a76d7dc324d95a7c7c173cb1c9f719dabc5b9509b75ba2d30dba2e8a6e7a6ed4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/strik?utm_term=livros+de+historia+em+ingles+para+iniciantes+pdf PDF link annotation
    • https://ferateritilew.weebly.com/uploads/1/3/4/2/134265971/vuwaniji.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/who_is_mandalorians_father.pdfIn PDF document text
    • http://mizizufiku.mywebcommunity.org/17852485111.pdfIn PDF document text
    • http://nunesop.scienceontheweb.net/rokinuwototolekogubo.pdfIn PDF document text
    • http://musomojil.mywebcommunity.org/can_parents_upload_videos_to_classdojo.pdfIn PDF document text
    • https://cdn.sqhk.co/supopareso/dpOdgcA/josavolonimulola.pdfIn PDF document text
    • https://zobirifojufegot.weebly.com/uploads/1/3/4/3/134374070/7164742.pdfIn PDF document text
    • http://trujillostacoshop.com/diablo_3_ps4_cheat_items4gjpw.pdfIn PDF document text
    • https://cdn.sqhk.co/nunologen/ZsOTc95/pop_music_meaning_and_example.pdfIn PDF document text
    • https://cdn.sqhk.co/dusivubeleza/9l8tFih/91100004611.pdfIn PDF document text
    • http://tricitysikhs.com/10_000_reasons_cello_sheet_musiclo0vc.pdfIn PDF document text
    • https://cdn.sqhk.co/jatobeguji/Bp1ZhgY/39221773240.pdfIn PDF document text
    • https://cdn.sqhk.co/danopefasuf/jsBfgfC/5888569744.pdfIn PDF document text
    • https://pubedazemel.weebly.com/uploads/1/3/4/8/134870130/muxewubabasog.pdfIn PDF document text
    • http://buwovavozu.getenjoyment.net/76257630527.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/new_mary_poppins_chimney_sweep_name.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_22734901647a4bb3b28f753a4d30ee28.pdf?index=trueIn PDF document text
    • http://bidusibebawuz.onlinewebshop.net/real_world_range_of_tesla_model_3_long_range.pdfIn PDF document text
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_1ad782e32ca340f1be8318c5dd0c2b62.pdf?index=trueIn PDF document text
    • https://78636f1b-f2d6-4e4a-b4e1-07eac4c165d1.filesusr.com/ugd/434c97_771205b11f444cab9a8cf9f5fbfea336.pdf?index=trueIn 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_off0000ec55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC55 5572 bytes
SHA-256: 3661e48de15dfdcbe677f33570f61c0f2c79e5179ee723c5d0c77f01854a8ce3
font_01_sfnt_off0000ff2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2A 12768 bytes
SHA-256: 96c7e79251f2be879006048143e98aa7173f1409d5fce8e16a9f4ed9afefde8c

Open this report in the interactive analyzer, or submit your own file for analysis.