Malicious PDF — malware analysis report

Static analysis result for SHA-256 6290a6722fdbf8f0…

MALICIOUS

PDF

57.9 KB Created: 2020-10-12 16:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ebb7f01b25a385057b268c8302432c43 SHA-1: 9e086ba1dca6b1957685902e2c503ed6008a425a SHA-256: 6290a6722fdbf8f00b2b3ecedfa324b742101ab2825dac853cc6c21afad655b7
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=bleach+filler+guide+list In PDF document text
    • https://site-1037164.mozfiles.com/files/1037164/52932730685.pdfIn PDF document text
    • https://site-1039391.mozfiles.com/files/1039391/geboditojonedaza.pdfIn PDF document text
    • https://site-1043491.mozfiles.com/files/1043491/fakefesudi.pdfIn PDF document text
    • https://site-1036862.mozfiles.com/files/1036862/sonogesulajobalozek.pdfIn PDF document text
    • https://site-1037163.mozfiles.com/files/1037163/nevekumo.pdfIn PDF document text
    • http://files.chna18.org/uploads/1/3/2/3/132302924/dff3b5740535.pdfIn PDF document text
    • http://koximi.atfsupply.com/uploads/1/3/1/0/131070161/goxamo.pdfIn PDF document text
    • http://ziwewise.thejordanhomestead.com/uploads/1/3/0/8/130814297/zapaxad-gerabuvikijobij.pdfIn PDF document text
    • http://bibilopeb.biocompatibilityhub.com/uploads/1/3/0/8/130874277/6345036.pdfIn PDF document text
    • http://files.crowntownpictures.com/uploads/1/3/0/7/130776460/036ee560.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/dc32706b-d9a3-4e05-aa09-c809d04dad41/16083026276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f98b1d0-eeb1-4b0a-93be-f90505ad48e8/jatupegesopimage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2181a11f-e5e8-46a8-b188-db6b6426cc00/71847098634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d5a7af4-8702-401c-b5a5-eff52f6edd5f/duxubivefenoroporonun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0924606f-d6d5-45f0-8191-87bb3e9e24a3/44572709808.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/390c1659-e40e-4a6d-bba3-b7ea2154c363/2461577237.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_off0000a5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5E9 5332 bytes
SHA-256: 61b57db920f1b04164a0b2d27200be2d53b1fb3ca6cabe123a1c4890e1db26a6
font_01_sfnt_off0000b7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7FC 10116 bytes
SHA-256: c619750795ec179d57b2edf48faf8888ee72444ccff7f98201cf7abe30d460e6

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