Malicious PDF — malware analysis report

Static analysis result for SHA-256 694dc72f0c7e253d…

MALICIOUS

PDF

101.0 KB Created: 2021-05-04 06:29:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3bd5bc05ff111e2a958af346ce037eb4 SHA-1: 92703352a80e32227be26879ad4d89e008fcfbf7 SHA-256: 694dc72f0c7e253d45bb28ba09d32aca14bbfe51a4725c56f3b99ca9bbf670fd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://nipisod.ru/strik?utm_term=turtle+beach+px51+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403119/normal_60162af05861e.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/rhgifjh/33498515059.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/angina_guideline.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382190/normal_5fc7927f0acb7.pdfIn PDF document text
    • http://koronekikofu.iblogger.org/ganesh_atharvashirsha_gujarati.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372384/normal_6027011184ec7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480187/normal_6023f75bee1e6.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/ghjjIib/46128829084.pdfIn PDF document text
    • http://wivafojoki.22web.org/rafalomeforokowuloteko.pdfIn PDF document text
    • http://artdebug.site/vakerolozk3l94.pdfIn PDF document text
    • https://cdn.sqhk.co/sosexazefip/jaggghZ/ios_waze_apps_like.pdfIn PDF document text
    • https://cdn.sqhk.co/siboxowimu/RgjuihW/beguriwisuruxubobedidej.pdfIn PDF document text
    • http://jazeforip.22web.org/letter_writing_format_for_school_admission_request.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464523/normal_5ffce1a7c1590.pdfIn PDF document text
    • http://italdom.fun/zalalekedofatifd7pv.pdfIn PDF document text
    • http://desokore.medianewsonline.com/64201305789.pdfIn PDF document text
    • http://mx50off.pro/strongs_bible_concordance_appav3ah.pdfIn PDF document text
    • http://mini-cam2.club/the_dark_age_of_the_devil_mod_apkujc1o.pdfIn PDF document text
    • http://newser.site/59981388866klcy4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pukupufiribeja.epizy.com/donuramitavujemozekedureg.pdfIn PDF document text
    • http://gosidopofabuv.epizy.com/who_oral_health_assessment_form_1997.pdfIn PDF document text
    • http://pivimufe.atwebpages.com/encyclopedia_of_chart_patterns_download.pdfIn PDF document text
    • http://tebuwawezizafes.onlinewebshop.net/stihl_blower_vacuum_bag.pdfIn PDF document text
    • http://fabedidatifi.onlinewebshop.net/86436201161.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_off000149d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149D8 5328 bytes
SHA-256: 3363c95f99886e961e3080a4246b363249e34652fd7cfb8860d17c0476a37193
font_01_sfnt_off00015bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BD5 13672 bytes
SHA-256: bdf3cdc81ee826dd3682ee59cbe77a15e3fd5c6473a387a7b25712b5959dfa6f

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