Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ec3a7c47cb0baf…

MALICIOUS

PDF

64.0 KB Created: 2020-10-03 22:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 004a060f85c8c28a8ec79c5564b79f56 SHA-1: e00cb73d958c38321e191bda9c147f3bcd97cc59 SHA-256: f8ec3a7c47cb0baf641beed660c8bac5f089ce1c931e744f68fcf12896616c8c
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.link/pify?keyword=netters+anatomy+pdf In PDF document text
    • https://site-1036951.mozfiles.com/files/1036951/86189429761.pdfIn PDF document text
    • https://site-1036750.mozfiles.com/files/1036750/76390323775.pdfIn PDF document text
    • https://site-1036798.mozfiles.com/files/1036798/mimabirozegapupekuk.pdfIn PDF document text
    • https://site-1036830.mozfiles.com/files/1036830/pejokori.pdfIn PDF document text
    • https://site-1037094.mozfiles.com/files/1037094/68591162769.pdfIn PDF document text
    • https://site-1041672.mozfiles.com/files/1041672/tozijevafupuzubegubexeze.pdfIn PDF document text
    • http://lemipevab.porttouristpark.com.au/uploads/1/3/0/8/130814761/fupijekaxurabonizef.pdfIn PDF document text
    • http://files.doubletroubleacademy.com/uploads/1/3/1/4/131483386/zafege.pdfIn PDF document text
    • http://wikupe.sjkim-tkd.com/uploads/1/3/1/6/131606875/bigofag.pdfIn PDF document text
    • http://files.pvrr.org/uploads/1/3/1/4/131438583/wexujuvemivojepipur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/243b5786-0aa3-47ae-8d36-2ff6e4fe162c/17099476049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea27c3ed-12b0-4c07-9022-f103b603138c/sowojaxawizexuramuzej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1358ef32-0478-4875-b6dc-f254ba05672e/34390531543.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92defd53-4c7d-44a1-b665-6f52fc072500/somizimutugidugem.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_off0000bd04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD04 5228 bytes
SHA-256: 40809eefad8e9f558bf502277526e718c75aca788712c08b88efca25bd45aad5
font_01_sfnt_off0000cec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC7 10892 bytes
SHA-256: ae1aba508e35eefe690b30dbf66c9276caa2c8f29a4fa4379a0f91357fd5a64a

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