Malicious PDF — malware analysis report

Static analysis result for SHA-256 8001bf9962f4cf8f…

MALICIOUS

PDF

41.8 KB Created: 2020-10-11 19:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dd44e1a24cda329389f6a0ab49e3f9f3 SHA-1: e07732bf196b0572360fd68d37fbdc5e1bf738de SHA-256: 8001bf9962f4cf8fbfa118163997b4575bc120ab8a79117895bbf8cbbdb84e98
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://cctraff.ru/strik?keyword=rslogix+5000+torrent In PDF document text
    • http://files.tristantrapp.com/uploads/1/3/1/4/131407197/3352576.pdfIn PDF document text
    • http://vizizoxib.insurancenewsmyrna.com/uploads/1/3/1/6/131606552/rabepov.pdfIn PDF document text
    • http://files.newaygocdnursery.org/uploads/1/3/1/4/131437823/cd530.pdfIn PDF document text
    • http://files.juiceboxesandbeerbottles.com/uploads/1/3/1/4/131407530/pedekodovol-kegumo-denamorolari-vunidusijo.pdfIn PDF document text
    • http://files.milinclinic.com/uploads/1/3/1/4/131437822/641ac951b01172.pdfIn PDF document text
    • https://site-1037152.mozfiles.com/files/1037152/39991387380.pdfIn PDF document text
    • https://site-1041378.mozfiles.com/files/1041378/juvumij.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/25dd45f6-68c4-4f50-8192-bc72a9fb436c/96414971341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1f7ea14-e36d-46dc-be00-40c3fcef78e3/43954761608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96c4c447-fb44-441e-9688-4ae5cb6f1b06/48955616071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a17d0dd3-7317-4c49-beaa-ebefdee30b2d/1650046889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d59b3cbd-bb38-45ad-a016-8da07987a2d7/foxekirejog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d2af244-ddc1-47a5-a7e8-aac929333c1c/tixavamosatazuxebefoted.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dc49c6b-6c76-4e96-8a5b-f7683255df69/rexemilitikojelimajib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fbf195d-51f0-4e41-9d61-2eeea36123b4/rabasotabenofadam.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_off00006155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6155 4984 bytes
SHA-256: 7eb408aa778eb92484cebb6e7767d8212771c98e5011e11f827a7f2eca755105
font_01_sfnt_off00007268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7268 12544 bytes
SHA-256: 997c209b3798f9375a818c2c243df7e90cee8e06539dd4f09e06c63c4ff0a617

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