Malicious PDF — malware analysis report

Static analysis result for SHA-256 568377e4258cbb3d…

MALICIOUS

PDF

44.4 KB Created: 2020-11-07 11:31:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 5cb447c89c4c6dd3b2edd01b3f2a880b SHA-1: bd19782dc1689a603949d87b366e7a94b6292b54 SHA-256: 568377e4258cbb3dad5e3e7364f3ec9aa8f887f9f354f7e36873d9764ae8a922
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 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.
  • 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://traffine.ru/123?keyword=fox+school+games In PDF document text
    • https://jolefopasovoja.weebly.com/uploads/1/3/4/4/134402584/zinowogor_lalemimekoxirux_bokasabed.pdfIn PDF document text
    • https://nogegonimever.weebly.com/uploads/1/3/4/3/134340032/wuxalotim_bixenibinawir.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/jesozitufas_bareradikakap_zopan.pdfIn PDF document text
    • https://nometoxuf.weebly.com/uploads/1/3/4/2/134266561/6462178.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/zikarab.pdfIn PDF document text
    • https://wusunipusu.weebly.com/uploads/1/3/4/3/134320006/wimutot_jowobigin_wowufeletewidar_purexe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://rabewinu.files.wordpress.com/2020/11/dewor.pdfIn PDF document text
    • https://sajasopul.files.wordpress.com/2020/11/53383047177.pdfIn PDF document text
    • https://jaxuxakom.files.wordpress.com/2020/11/super_mario_sunshine_rom_download_emuparadise.pdfIn PDF document text
    • https://jelapem.files.wordpress.com/2020/11/kuzirorupimepolowu.pdfIn PDF document text
    • https://winomosefari.files.wordpress.com/2020/11/wixazimemosibejol.pdfIn PDF document text
    • https://likuzow.files.wordpress.com/2020/11/40264502684.pdfIn PDF document text
    • https://nanekezutela.files.wordpress.com/2020/11/mofutetoraxekeligun.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_off00007106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7106 5140 bytes
SHA-256: 31f8a22c08a6492569dadc5e994cf047c6e041431a858c66b77a8eb2f8cfcd08
font_01_sfnt_off0000826c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x826C 10320 bytes
SHA-256: a0d4c8e8dafae3a66bdbf480c468d69ce5faf58aee79f61ab6a2b6476a48105c