Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9df97f4cd07fc92…

MALICIOUS

PDF

48.2 KB Created: 2020-10-04 14:36:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 4648c171354418060b7d2201091be6fd SHA-1: ff92d91033ff2e28ab0f1e4fa8d90398eb98a30e SHA-256: c9df97f4cd07fc92c671f5d6dd6292af79125d0059e1664064c7135690bd1ccd
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=asme+ix+interpretations+pdf In PDF document text
    • http://wetuxi.imhapkido.com/uploads/1/3/0/8/130874384/vakimibedulib.pdfIn PDF document text
    • http://riwusof.interdynartis.com/uploads/1/3/1/3/131384169/raromimutamowav.pdfIn PDF document text
    • http://files.alexandrashatalov.com/uploads/1/3/0/8/130813692/mozikuvigorexek_vexaxirux_mozituteni_wogakaxijibet.pdfIn PDF document text
    • https://site-1042834.mozfiles.com/files/1042834/wagazapewavek.pdfIn PDF document text
    • https://site-1038820.mozfiles.com/files/1038820/luvidulabuze.pdfIn PDF document text
    • https://site-1037143.mozfiles.com/files/1037143/navunodojebivixojomozojup.pdfIn PDF document text
    • http://viwaduma.glisteningdivas.com/uploads/1/3/1/8/131871864/3438286.pdfIn PDF document text
    • http://pibipaz.carrollspurco.com/uploads/1/3/1/3/131380600/timire.pdfIn PDF document text
    • https://site-1038938.mozfiles.com/files/1038938/vatironikevabubi.pdfIn PDF document text
    • https://site-1043237.mozfiles.com/files/1043237/95128992134.pdfIn PDF document text
    • https://site-1036971.mozfiles.com/files/1036971/zepexuxenidi.pdfIn PDF document text
    • https://site-1036626.mozfiles.com/files/1036626/50579713628.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
    • 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_off000060b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B2 5000 bytes
SHA-256: 769ad1b54d197b1e7d58ae711ee13af8b84cdd81d0a4967e892970f69677b5d9
font_01_sfnt_off00007190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7190 16552 bytes
SHA-256: 7bb1f05f59adf839ddacbbd2d673feae6347996ac7a5d592256ad9a1b8fa45bb
font_02_sfnt_off0000a421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA421 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2