Malicious PDF — malware analysis report

Static analysis result for SHA-256 528f2a6cbafa3900…

MALICIOUS

PDF

36.9 KB Created: 2020-11-09 10:50:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: bd5cf9d9029617823c07326cd5113ab2 SHA-1: 5500fb9cffad2474975c914e73b92b38f78eaa37 SHA-256: 528f2a6cbafa3900e178437ea4758a29f3f87828b18ac9a5f5d54696f79cd600
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=rp+character+personality+generator PDF link annotation
    • https://nirafagasebop.weebly.com/uploads/1/3/4/5/134588809/jirurubat-xurib-rafap-mubawef.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/5106354.pdfIn PDF document text
    • https://sadoxeliwuduw.weebly.com/uploads/1/3/4/0/134040540/fovemuloxod.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/ca8a40be-2673-422b-84b9-f3db12ae57a3/rwby_white_rose_deviantart.pdfIn PDF document text
    • https://gibalon.files.wordpress.com/2020/11/lofejifif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e622578d-72db-461b-aebc-a49ae30bfc5e/taxogoxoluwogaligel.pdfIn PDF document text
    • https://pegivafonaj.files.wordpress.com/2020/11/annex_10_volume_3.pdfIn PDF document text
    • https://delogifelet.files.wordpress.com/2020/11/37502846952.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/carlos_xuma_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fef515d-84b0-4b4e-a359-145e3c09470c/39297034388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48578554-8686-479e-84e7-8821736d38d3/behringer_1204usb_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c90bfc03-6b73-4049-9adf-0921c9e8178b/why_do_people_hate_fortnite.pdfIn PDF document text
    • https://solopores.files.wordpress.com/2020/11/manual_silk_screen_printing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/nafekoradexifolujed.pdfIn PDF document text
    • https://pasavonipi.files.wordpress.com/2020/11/zokik.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_off000051d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51D9 5304 bytes
SHA-256: 0da3c76d1691ea635a9e83bc76395f353a55aa08f9e0ed7111c24d7305690565
font_01_sfnt_off000063eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EB 10224 bytes
SHA-256: 2ddd71ace4a7b1279bda01a701efd697246937b3ecad0e89979ac08c9ffbf8dd