Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6e1d271ee481e5f…

MALICIOUS

PDF

53.1 KB Created: 2020-09-30 01:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 78c72dce07453f203407531816eea0bd SHA-1: 39f966cef12389e6837322678ca5a02e3edbbc35 SHA-256: a6e1d271ee481e5f40fdbf9af6ab31fdb26816d63d277e64cb1f08727ab5da9b
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://cctraff.ru/strik?keyword=practical+christian+theology+pdf In PDF document text
    • http://files.gamedayfitness.net/uploads/1/3/1/8/131856852/boxiwu_wixapen.pdfIn PDF document text
    • http://files.thewallssager.com/uploads/1/3/0/7/130775846/zofudaxeluzun-vogake.pdfIn PDF document text
    • http://files.sharidellapenna.com/uploads/1/3/0/8/130813988/romijojeledatuxusepo.pdfIn PDF document text
    • https://site-1037260.mozfiles.com/files/1037260/nobil.pdfIn PDF document text
    • https://site-1036656.mozfiles.com/files/1036656/19443116161.pdfIn PDF document text
    • https://site-1037262.mozfiles.com/files/1037262/75216692225.pdfIn PDF document text
    • https://site-1037178.mozfiles.com/files/1037178/26420071654.pdfIn PDF document text
    • https://site-1036848.mozfiles.com/files/1036848/57136724289.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://uploads.strikinglycdn.com/files/8f57413c-da83-4f75-94a7-623ecb288a03/temuvigeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24944307-0651-43c5-bfcc-db0eddaa588c/lubinoxuzede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/93555500816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8294/7229/files/intermatic_timer_manual_dt620ch.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_off00008478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8478 5308 bytes
SHA-256: 91a1518d4b324c5126b07ffb04277dac55906fd14723e97f1cf0c626d8083a6f
font_01_sfnt_off0000966f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x966F 10312 bytes
SHA-256: a9ddc0b76f8d3afb178f07bb64ab7a8fdf125afa4fa9cd919bee89ff706b3f67
font_02_sfnt_off0000b988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB988 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176