Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc63f00c658b6427…

MALICIOUS

PDF

47.8 KB Created: 2020-10-06 21:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 94e8a773ffe0aace6c471f22810b4abe SHA-1: 331a8d0afe5f83340630e9f7565b640a9a908710 SHA-256: dc63f00c658b64278ccc7e103ef1be9c486cc68ddd630f8f6d98a16b119bf8d1
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://ttraff.club/pify?keyword=chemical+periodicity+objectives+worksheet In PDF document text
    • https://site-1038765.mozfiles.com/files/1038765/90925952847.pdfIn PDF document text
    • https://site-1037177.mozfiles.com/files/1037177/6999023632.pdfIn PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/sutomerowowaj.pdfIn PDF document text
    • https://site-1040516.mozfiles.com/files/1040516/xapivixosogigaxumixex.pdfIn PDF document text
    • https://site-1043172.mozfiles.com/files/1043172/tikelifabenebudizukulax.pdfIn PDF document text
    • http://files.mythicfirecreations.com/uploads/1/3/0/9/130969885/boseniba.pdfIn PDF document text
    • http://lusojuj.candeetrain.lt/uploads/1/3/1/8/131857916/roxoruv_timagesorinav.pdfIn PDF document text
    • http://files.acaistorybkk.com/uploads/1/3/2/6/132696174/zapetifiru-riborogibagujug-fivodepumegutep.pdfIn PDF document text
    • http://files.colinmooresculpture.com/uploads/1/3/0/7/130739087/zujabamav_dejogurazab_juzidovoxe_papulomu.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://uploads.strikinglycdn.com/files/fda5886a-59bb-4994-9bb2-d5690266bdc4/71808176250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1eb4aa2-04d7-4325-9b2b-36aab1aeada8/5520843484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c841162-899a-4e18-8b68-f07684116325/53332017891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4874f97b-0b64-4632-a630-de80f6844316/senawew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0872/1049/files/barnacle_boy_and_mermaid_man_episodes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1771/7920/files/bunibovibaxuramab.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_off00006db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB2 5552 bytes
SHA-256: 51b8f19de9b6e42f12db2d9b354074ceb3aaa27a4f67d8e181c9650d09003913
font_01_sfnt_off000080a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A9 10280 bytes
SHA-256: 4c431072ff2edb8abb692cf994a190f1c77ee13d6abefabd18aa206dc7e61ea8
font_02_sfnt_off0000a3e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3E0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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