Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d4d7c1e20786853…

MALICIOUS

PDF

76.2 KB Created: 2021-02-26 21:09:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 496dcd7535f34437bbc51aacf997ee0f SHA-1: 5dd768c68585d56646079c0ab61510e8ae2f812b SHA-256: 4d4d7c1e207868532a081b26d6711a1677a2a22311938b79dbac9b59803df39f
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple heuristics indicating malicious intent, including ML classification, a link farm on disposable hosting, and a password-protected archive lure. The embedded URLs suggest the document is part of a phishing campaign aiming to trick users into downloading malware disguised as legitimate files. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://vilenefex.ru/award?keyword=kenmore+gas+oven+igniter+replacement PDF link annotation
    • http://reduslimitaly-official.site/hitman_agent_47_27eqwh.pdfIn PDF document text
    • https://cdn.sqhk.co/mudemodox/pr4jegc/60449819120.pdfIn PDF document text
    • https://dezirivudamowi.weebly.com/uploads/1/3/1/8/131856369/bazuxuronigifarokof.pdfIn PDF document text
    • http://fujozed.22web.org/worksheet_math_grade_3.pdfIn PDF document text
    • https://xugimitedekilim.weebly.com/uploads/1/3/1/4/131482884/a9831a2.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/pusidafewad.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/d6b512fda0.pdfIn PDF document text
    • http://1cats.space/community_acquired_pneumonia_treatment_guidelinesduynq.pdfIn PDF document text
    • https://wetusaseri.weebly.com/uploads/1/3/5/2/135297966/35e48657.pdfIn PDF document text
    • https://lulotileja.weebly.com/uploads/1/3/0/8/130873917/08b9011d13d7.pdfIn PDF document text
    • https://zojevobe.weebly.com/uploads/1/3/1/1/131163992/67dc9.pdfIn PDF document text
    • http://kebotup.66ghz.com/bhagavad_gita_bengali.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/nW4jaih/flashing_lights_kanye_lyrics_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/doxowite/Iwchchj/dovelobakarolerefi.pdfIn PDF document text
    • http://national-verifyteam.com/jajezofumoxedepitugudum5kq8.pdfIn PDF document text
    • http://berkeciftci.net/global_reporting_initiative_g4_sustainability_reporting_guidelinesdw7o3.pdfIn PDF document text
    • http://indohealth365.online/73339276740fhbxp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nofadokar.rf.gd/gepejujijodo.pdfIn PDF document text
    • http://lugavatakavupo.rf.gd/nalaxeva.pdfIn PDF document text
    • http://monuwuwotivonil.epizy.com/80080538831.pdfIn PDF document text
    • http://pinakebe.rf.gd/adobe_photoshop_t-_shirt_design_template.pdfIn PDF document text
    • http://betupaxomivokab.epizy.com/equity_company_balance_sheet.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_off0000ed59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED59 5280 bytes
SHA-256: c11aa9b6b2fa5212576d676e72b9f625af3be6d438a0e7045a1f42b2b9924884
font_01_sfnt_off0000ff4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4C 10548 bytes
SHA-256: 2158bbfd2402be6f68150018d30af8825dcdaf58baab2a5d2a36d3caf26ae594

Open this report in the interactive analyzer, or submit your own file for analysis.