Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d5167de6da6459…

MALICIOUS

PDF

74.4 KB Created: 2021-02-09 12:33:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: bcdac713ce8d0cb628c725fb662133b3 SHA-1: 3e2e244d71e720906c61ba876cf5669ba3006773 SHA-256: 26d5167de6da645933227672f15a9be9687aa3a43b5468921f8565b499ae4ada
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body appears to be obfuscated or corrupted, but the presence of URLs like 'https://yafferge.ru/123?utm_term=cvs+blood+pressure+monitor+manual+bp3mw1-4b' suggests a lure to a malicious site.

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=cvs+blood+pressure+monitor+manual+bp3mw1-4b In PDF document text
    • http://ligazilafibab.22web.org/loderepewun.pdfIn PDF document text
    • http://spiritstudio.ru/tujirorixikututikiromuvim3qtz4.pdfIn PDF document text
    • http://moshon.space/hockey_coaching_courses_near_meyim7d.pdfIn PDF document text
    • http://questotzvezd.space/wutusegugapidomibezobaie18g.pdfIn PDF document text
    • http://gelchlen.fun/galaxy_invader_alien_shooterxgf2e.pdfIn PDF document text
    • http://reduslimitalia.website/24675838588vy3vj.pdfIn PDF document text
    • http://prazdnikprosto.ru/36106311324swf3f.pdfIn PDF document text
    • http://richmaya.site/witogpor6k.pdfIn PDF document text
    • http://itactical.xyz/nebupomakokudiwikew921wb.pdfIn PDF document text
    • http://bt-management.website/4925609832kkzrc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kexesunewe.rf.gd/music_maker_software_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/91477075674.pdfIn PDF document text
    • http://jufomotapi.epizy.com/branding_logo_design_templates.pdfIn PDF document text
    • http://voboxixet.rf.gd/the_hunter_s_prayer_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/62950653980.pdfIn PDF document text
    • http://xibiwoziveva.epizy.com/69876738839.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/apkpure_apk_for_jio_phone.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_off0000e484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE484 5636 bytes
SHA-256: c8f875c23c929046e3f4cc0f2241d3d59381a6ec095f4024f54cc3d22111c926
font_01_sfnt_off0000f7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B3 10816 bytes
SHA-256: 679a152a6f4565064cb96b6a4d00b1867054e32fa91632f4087ce51cc704041f