Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67da814d3d35a10…

MALICIOUS

PDF

90.4 KB Created: 2021-03-04 15:32:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 06de7ad2fb20859225b572f4578c0293 SHA-1: 6b4201e7e6fa25ca0be80f46086db6063068dc5a SHA-256: e67da814d3d35a10eb0e3d80e82ae6cb406e6f7eca59c1e9f875f76a57d3bc38
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with one pointing to 'seumenha.ru', suggesting a phishing lure. The heuristic 'SE_URGENCY_LURE' further supports the phishing pretext by indicating the document contains urgency language. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://seumenha.ru/123?utm_term=what+is+the+youth+justice+system+in+the+uk PDF link annotation
    • http://waranijovuv.sportsontheweb.net/65580081789.pdfIn PDF document text
    • https://xasonametig.weebly.com/uploads/1/3/2/3/132303127/844a7c0ca1c.pdfIn PDF document text
    • http://gumidaz.medianewsonline.com/best_free_alternatives_to_premiere_pro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417207/normal_5fe1047cf1085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392867/normal_60146b52b9984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419205/normal_602dd9eec4eb3.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/pijedupaxusudinujudo.pdfIn PDF document text
    • https://vazatevetag.weebly.com/uploads/1/3/0/8/130874289/xujasaxudumawutu.pdfIn PDF document text
    • http://kijofizovurisos.medianewsonline.com/bible_trivia_questions_and_answers.pdfIn PDF document text
    • http://moxegagiku.22web.org/17864549805.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481400/normal_5fdf7e2fc8013.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/feverurawota.pdfIn PDF document text
    • https://womazineput.weebly.com/uploads/1/3/4/8/134895737/0651ddcb69e.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/letibitademikupe.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/gazivemon/66385790696.pdfIn PDF document text
    • http://rigidafavubo.myartsonline.com/86168467871.pdfIn PDF document text
    • http://manajotoxu.epizy.com/53696722887.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/vernier_caliper_worksheet_with_answers.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/92780804228.pdfIn PDF document text
    • http://roxujewov.myartsonline.com/what_are_the_4_parts_to_darwins_theory_of_natural_selection.pdfIn PDF document text
    • http://nanaxidimidi.atwebpages.com/43679737379.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/buddyfight_area_android.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_off000125f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F4 5168 bytes
SHA-256: 80e210e324ca78323d435aafe89cfa967eb1d4f68fff250d355376af96b1af84
font_01_sfnt_off0001377b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1377B 10960 bytes
SHA-256: b8dc4646c172349c7b9c6c143d47b8773128827a6db7d3d7aca9579ca896cd7a

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