Malicious PDF — malware analysis report

Static analysis result for SHA-256 e138566f78f2f71a…

MALICIOUS

PDF

65.4 KB Created: 2021-02-04 20:06:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c3e9df18901f856c613889a70e22ae6a SHA-1: 82ed17ae34b0da9cdf218c360a1efd500a66b5d6 SHA-256: e138566f78f2f71af91b6aadb1c9aa327fdf6ebf3d6e15aba810adf3e1708518
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=case%20animatronics%20game%20free In PDF document text
    • http://zeropium.com/fildo_for_windowskijp3.pdfIn PDF document text
    • http://rezonansmusic.com/wuxizuml5uv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502511/normal_5fd23bffd5821.pdfIn PDF document text
    • http://rcasino.info/26891291550rvhc2.pdfIn PDF document text
    • http://runolive.com/salesoxulamuualjb.pdfIn PDF document text
    • http://hookup668.site/dyes_and_pigments_ielts_reading_answxhulx.pdfIn PDF document text
    • http://idealica-it.website/slot_machine_games_free_play8oniu.pdfIn PDF document text
    • http://copyrightsupporthelpcenter.com/jawbone_big_jambox_manual_resetktidx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404523/normal_5ff6104e6f9ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392877/normal_5fee9e0781bc6.pdfIn PDF document text
    • http://rukozhop-guide.com/watercolor_mixing_chartnr5v7.pdfIn PDF document text
    • http://dragonflysagewellness.com/49147118972o9fg6.pdfIn PDF document text
    • http://dk-inc.xyz/wafewuvi86w4p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/geloxisitirev.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/blank_swot_analysis_template_doc.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_off0000c350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC350 5076 bytes
SHA-256: 5970628c17d6733fd9fae587b19fa5b0fd88f0e898cc140ad5a609a14a1fe976
font_01_sfnt_off0000d47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47E 10760 bytes
SHA-256: 5e0f8f69ad290cc4a6a87641273a7198ca7fdc6efe8849eaff287db5560ff6f3