Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b23399925c9d0ad…

MALICIOUS

PDF

38.4 KB Created: 2020-11-06 21:41:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 26fd2df8d9ba0084bca0087bbc2e34b9 SHA-1: 43dcec1455fad82f1b70ee73483fbebc3794e28d SHA-256: 6b23399925c9d0ad73761a0e126710089c8f6885aa9f6a80eb07817aa22924ad
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=plate+tectonics+crossword+puzzle+key PDF link annotation
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/1647808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_5f9393442bc15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_5f90ded54bd58.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://tevarew.files.wordpress.com/2020/11/88608638079.pdfIn PDF document text
    • https://fizafadolozu.files.wordpress.com/2020/11/31713389540.pdfIn PDF document text
    • https://bifudavoz.files.wordpress.com/2020/11/sawubigefifijajiwon.pdfIn PDF document text
    • https://tuxabavijig.files.wordpress.com/2020/11/37940387668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91cf7f74-73f1-42c9-b295-61467f836b85/95807112191.pdfIn PDF document text
    • https://lalesadu.files.wordpress.com/2020/11/nupurowovuzonutilupip.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/45011013036.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_off00004d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D25 5260 bytes
SHA-256: d66bc57978e03ee848269a72a89480989fbc4e9a4e4ab623ae2d3594a643bd17
font_01_sfnt_off00005f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F22 9352 bytes
SHA-256: 3872f8a60dd560ef6b4cb1e326dfa2406336d5539ea3253676600ec04c4b2b37
font_02_sfnt_off00007f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F17 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34