Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d337135f05c1ed8…

MALICIOUS

PDF

49.9 KB Created: 2020-11-06 17:19:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d1a5eb8c0d49d88572908a7d448795d7 SHA-1: 1c211f5ee271cc6f577ae665bcb63409d4ab36fa SHA-256: 5d337135f05c1ed86b9696405233236914308956347f109af51943e1ca3492e7
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffmen.ru/123?keyword=claim+me+read+online+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369922/normal_5f95ce55780b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377908/normal_5f8e19b979f69.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://luvomax.files.wordpress.com/2020/11/80415048786.pdfIn PDF document text
    • https://notazit.files.wordpress.com/2020/11/76591847690.pdfIn PDF document text
    • https://sisiviweze.files.wordpress.com/2020/11/50939477702.pdfIn PDF document text
    • https://gogajajar.files.wordpress.com/2020/11/48539197016.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/bloons_tower_defense_unblocked_games_4u.pdfIn PDF document text
    • https://damilum.files.wordpress.com/2020/11/fotozigirevukekes.pdfIn PDF document text
    • https://kebupud.files.wordpress.com/2020/11/16674380217.pdfIn PDF document text
    • https://pokagiriti.files.wordpress.com/2020/11/retitoxamarivo.pdfIn PDF document text
    • https://fimalul.files.wordpress.com/2020/11/xenikefeg.pdfIn PDF document text
    • https://rotadenig.files.wordpress.com/2020/11/82236523173.pdfIn PDF document text
    • https://lenitipazevu.files.wordpress.com/2020/11/xisagobibesaxugidin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e8f3c5b-12bd-4f4a-a296-554afacfabff/paradise_lost_multiple_choice_questions.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79F2 4604 bytes
SHA-256: fee28e73bfb65d1c56741350a5872753658378fcf8d5d89cb9604d97d1ace0ff
font_01_sfnt_off00008972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8972 10308 bytes
SHA-256: 7a2cbf9b42373723c08309043f37b2820bc2859b11597f08ac77cff307164bee
font_02_sfnt_off0000ac61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC61 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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