Malicious PDF — malware analysis report

Static analysis result for SHA-256 526c7ada4d60b157…

MALICIOUS

PDF

45.5 KB Created: 2020-11-06 21:02:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-18
MD5: 79c3e999d404aabef93fa19068391a20 SHA-1: 288740ea38778d9a159e39a2f26f90bea5ff1ff5 SHA-256: 526c7ada4d60b1575d735aec30fd956be90e12780e35e54c1e05df59c379537e
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://traffking.ru/123?keyword=solar+system+study+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384144/normal_5f92fa72b1c7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f8711a53c348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373987/normal_5f8b28199be2f.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://xemeroxatud.files.wordpress.com/2020/11/36886831924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08d76443-9933-4f26-9b85-78d16bf10b00/anthony_coal_fired_pizza_menu.pdfIn PDF document text
    • https://fidunonip.files.wordpress.com/2020/11/8625666511.pdfIn PDF document text
    • https://mudadabup.files.wordpress.com/2020/11/jevazejenamatotebuz.pdfIn PDF document text
    • https://ronesifipule.files.wordpress.com/2020/11/pasefojowabe.pdfIn PDF document text
    • https://fovodifikade.files.wordpress.com/2020/11/34348140425.pdfIn PDF document text
    • https://vabavoresadi.files.wordpress.com/2020/11/debewasomogoro.pdfIn PDF document text
    • https://fefitaw.files.wordpress.com/2020/11/64939725781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e965c85-12a1-46fc-a13a-b075f0de80ce/16494243387.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/reremuradivuvevedivogobid.pdfIn PDF document text
    • https://rotadenig.files.wordpress.com/2020/11/82236523173.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_off00006601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6601 5128 bytes
SHA-256: 1586a308d16da6da55bd4aecd6e8edd6c7e2b68dbeecd2c4ddec9688be5a7e8e
font_01_sfnt_off00007771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7771 10396 bytes
SHA-256: b375efce416de5017f4a58fa2105db6558cd49cb56b4027c821bfbcdb0ebd4ea
font_02_sfnt_off00009af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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