Malicious PDF — malware analysis report

Static analysis result for SHA-256 a65455e5af10e635…

MALICIOUS

PDF

74.0 KB Created: 2021-03-24 04:18:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b8ec866fe117eb030c77974f8fe9334a SHA-1: 6c9f0aad07e1a73f15cbdc77e4b7f0c52db9b975 SHA-256: a65455e5af10e6356321dde2b3275ba0b941e408cf2d8634af0c84135c4ffaae
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary focus on `https://botokaw.ru/wix?keyword=powerschool+ucps+parkwood`. Heuristics indicate this PDF is part of a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

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
  • 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://botokaw.ru/wix?keyword=powerschool+ucps+parkwood PDF link annotation
    • https://cdn.sqhk.co/nesadatifu/hjchaGH/domino_effect_definition_biology.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421209/normal_5fe907681e081.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/bmoPXje/good_murder_mystery_movies_pg_13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456999/normal_60132715bbf15.pdfIn PDF document text
    • http://xesapuwax.mywebcommunity.org/doximisibaduxusiwu.pdfIn PDF document text
    • https://cdn.sqhk.co/xezakomujar/hajeuhh/gorasovegukaxerogejeka.pdfIn PDF document text
    • http://zarewubizeno.mywebcommunity.org/59215997561.pdfIn PDF document text
    • http://balegetiwep.mywebcommunity.org/70881111139.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444636/normal_600121c826eae.pdfIn PDF document text
    • http://majovevalaji.sportsontheweb.net/29025144762.pdfIn PDF document text
    • https://cdn.sqhk.co/kufalavoxig/1sCjMKe/90166204292.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://negumigimewote.onlinewebshop.net/sadavopaxesonufefuzesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e026db36-1ccd-4733-8d3d-36c0792ca87a/pearson_realize_algebra_1_common_core_textbook.pdfIn PDF document text
    • http://legokejapo.atwebpages.com/swear_words_in_arabic_to_english.pdfIn PDF document text
    • http://gevejonitu.onlinewebshop.net/34431748908.pdfIn PDF document text
    • http://xutenasejubibe.atwebpages.com/adobe_acrobat_reader_viewer_editor_creator_apk_download.pdfIn PDF document text
    • http://fojosotum.myartsonline.com/21912859133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9376d363-a0c8-44cf-857c-60c0a255e889/23937373734.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_off0000e1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A0 5320 bytes
SHA-256: 661ab92b2c963baedbbe862d1eddeb706b6a1df66c78e6119f709697e3dc0b9b
font_01_sfnt_off0000f3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BE 11396 bytes
SHA-256: 06178a7f880c665451f943c488be97f1fd3f4bbf30ae173c993476539befd4f5

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