Malicious PDF — malware analysis report

Static analysis result for SHA-256 83fab38843f6942f…

MALICIOUS

PDF

42.7 KB Created: 2020-10-04 00:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0bddb61f1f664521aa68fdac8253300e SHA-1: 321e827409705ca279da275378206e5ee96b635f SHA-256: 83fab38843f6942f955cd81e01f0d3173a94f25b1d5338ea85e5bbb1b6f91e24
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://ggtraff.ru/strik?keyword=solution+manual+abstract+algebra+dummit+foote In PDF document text
    • https://site-1041946.mozfiles.com/files/1041946/gasadaleduludok.pdfIn PDF document text
    • https://site-1039350.mozfiles.com/files/1039350/88937370034.pdfIn PDF document text
    • https://site-1036879.mozfiles.com/files/1036879/34366609275.pdfIn PDF document text
    • https://site-1037906.mozfiles.com/files/1037906/towitapobuva.pdfIn PDF document text
    • https://site-1039656.mozfiles.com/files/1039656/kirimifuxudawokobu.pdfIn PDF document text
    • http://mageje.reidcarrescia.com/uploads/1/3/0/9/130969336/2452731.pdfIn PDF document text
    • http://files.binyacatalog.com/uploads/1/3/1/3/131384401/7779058.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/2eba3189-a951-4cf5-b44c-b144f360ebdd/vajodefemenemobajuzen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bfdb662-985c-4581-a48b-06efada8dcd7/minil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/354dc5dc-51f8-4a73-93e6-f7a025a3c752/bopinarubotizoloro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fadefca1-2a6d-47fb-9e33-12dcc4fea0a3/tuxilowutilenetomokidabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d8102b1-e576-4256-ac80-da0f5c894718/lomevalof.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_off00006897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6897 5584 bytes
SHA-256: 8e3573540d06ca2d8baef3e1e8c1343d858236801ee55a669f1004c1e7b857e2
font_01_sfnt_off00007b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6E 10024 bytes
SHA-256: 06eaee3a2e3727c911d00f43a0a7417f8fc36dcd10b33d382d55b00077879da5