Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb8d6cae6281f17…

MALICIOUS

PDF

67.5 KB Created: 2021-02-11 19:11:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 256a5f82f76c4898f0d09ca1a9dd8311 SHA-1: 1e13290722841cb20fad85780593a0d930a97001 SHA-256: ffb8d6cae6281f170634af015458d03e6ce2307d0a01b8b852471c31179bf651
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/123?utm_term=praetorian+insurance+company+via+qbe In PDF document text
    • http://jokebixa.22web.org/zotegubedun.pdfIn PDF document text
    • http://politach.com/37565343060wvpvn.pdfIn PDF document text
    • http://bamasadukarudam.iblogger.org/difference_between_analog_and_digital_computer.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/giY9ib0/vadojikodibazinok.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/kieClib/55277830648.pdfIn PDF document text
    • https://cdn.sqhk.co/fujonexa/mhjjgf5/hyperpop_smash_it_all_lyrics.pdfIn PDF document text
    • http://abanca-electronica.com/tipos_de_narradortoarw.pdfIn PDF document text
    • https://cdn.sqhk.co/supuzeren/IetR2ha/sabewik.pdfIn PDF document text
    • http://proflist-kursk.ru/punimoma2gept.pdfIn PDF document text
    • http://chelobaka.space/6735734016ugu4v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rajixubododafu.epizy.com/nj_driving_test_questions_and_answers_free.pdfIn PDF document text
    • http://zovitox.epizy.com/53060331347.pdfIn PDF document text
    • http://podapuleleg.epizy.com/accidents_reported_today_york_pa.pdfIn PDF document text
    • http://kaxinezapur.epizy.com/2005_chevy_tahoe_z71_owners_manual.pdfIn PDF document text
    • http://silapopo.epizy.com/30633975477.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_off0000cc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC02 5476 bytes
SHA-256: d2b3cceec86504f35ad5034280a87f03dfd908a09c7a3184a524b41b7814b65c
font_01_sfnt_off0000de99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE99 10156 bytes
SHA-256: a6d783884181700bf145813bd11b119d8ad4a00deabdaa00e1b9e24274f48f7c