Malicious PDF — malware analysis report

Static analysis result for SHA-256 661af6e4f02125f3…

MALICIOUS

PDF

36.1 KB Created: 2020-10-02 03:34:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: f27ccb485584edc700104908c6aedb9e SHA-1: 548c46efd3f0bb2f2bb512f0b9d8baa694b67f71 SHA-256: 661af6e4f02125f3911f6f3aee3176d1a7bb6b9bf18747d82e544e50cc1ba1bb
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://gettraff.ru/strik?keyword=pharmacology+an+introduction+7th+edition+pdf In PDF document text
    • https://site-1039421.mozfiles.com/files/1039421/rixekixigilazawiwafebi.pdfIn PDF document text
    • https://site-1036680.mozfiles.com/files/1036680/susowad.pdfIn PDF document text
    • https://site-1037253.mozfiles.com/files/1037253/xiwesinidiguvapuv.pdfIn PDF document text
    • https://site-1038951.mozfiles.com/files/1038951/kapapurodigabapekevomuv.pdfIn PDF document text
    • https://site-1036835.mozfiles.com/files/1036835/dutozoranewave.pdfIn PDF document text
    • http://files.williambouman.com/uploads/1/3/0/8/130874261/juxoxixofaba.pdfIn PDF document text
    • http://files.ropingthemoonstudio.com/uploads/1/3/2/7/132740925/wigekivawevoro.pdfIn PDF document text
    • http://tibimolat.imsweightlosscenter.com/uploads/1/3/1/4/131407668/letajus.pdfIn PDF document text
    • http://nifuz.celebrating40.com/uploads/1/3/1/1/131163859/zujukujuzut-sevef-ranivamujek-lenulasa.pdfIn PDF document text
    • http://files.gettysburgchambermusic.org/uploads/1/3/1/8/131872087/633458.pdfIn PDF document text
    • https://site-1037055.mozfiles.com/files/1037055/jewawuzufisutimamagun.pdfIn PDF document text
    • https://site-1036975.mozfiles.com/files/1036975/nezamesakopumibatitifowub.pdfIn PDF document text
    • https://site-1037125.mozfiles.com/files/1037125/97243415639.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/d1e477d0-8366-4f4a-986a-33ecc01c283f/wapojuforo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4b2395-8f4f-498c-9846-c5c52795709b/gufojediduzugomefozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a522172c-153a-4570-a4ab-7354d56b61ec/vufabakefukoliniguz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a647d74c-47d2-4071-81fd-5fbf913d441c/98256299092.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_off00004f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F06 5576 bytes
SHA-256: 34783e53f7bdf774882df47a644980ef2b6995faeadd1db46d7dd00fd5f3d01d
font_01_sfnt_off000061e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E0 9844 bytes
SHA-256: 99e9ab5022a5fda546661f875e5214805c833015cbe5505657d6637e6c7365f4