Malicious PDF — malware analysis report

Static analysis result for SHA-256 d628780cd825523f…

MALICIOUS

PDF

87.3 KB Created: 2021-02-28 12:07:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b8bb02673620ae77fe8126f7045eda26 SHA-1: 9c25c50d03e489fc749772314efb390e411d8b8e SHA-256: d628780cd825523fca5ef9c5555ea321407d9e52f97db6a8c1974f0141992152
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and embedded URLs, with one specifically pointing to 'botokaw.ru', suggesting a phishing or malware distribution attempt. The PDF structure and embedded links are indicative of a tactic to redirect users to potentially harmful content.

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=bumblebee+african+cichlid+male+or+female PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454422/normal_603a0a3ab872c.pdfIn PDF document text
    • http://best-store.club/9262761545459euu.pdfIn PDF document text
    • http://medicalpracticementor.com/police_accident_report_torontosnkqg.pdfIn PDF document text
    • http://sreda.city/anet_a8_installation_guideddsyn.pdfIn PDF document text
    • http://jibinomazovujug.22web.org/bitlocker_to_go_for_android.pdfIn PDF document text
    • http://newsportstechnology.ru/facebook_video_er_online_free_mp4gy72w.pdfIn PDF document text
    • http://rubisteq.online/linking_verbs_definition_for_grade_3cpxr7.pdfIn PDF document text
    • http://zonamumajotodot.iblogger.org/50596569897.pdfIn PDF document text
    • http://dixojele.22web.org/ruxixinibaxojagi.pdfIn PDF document text
    • http://legrand-spb.ru/23673235179qsfbv.pdfIn PDF document text
    • http://1eyvgo.xyz/how_to_use_adjective_in_spanish1u0mx.pdfIn PDF document text
    • http://probkin34.xyz/apple_tv_3eme_generation_app_storeh57ql.pdfIn PDF document text
    • http://wutoxurusot.iblogger.org/95943177757.pdfIn PDF document text
    • http://ukrdomonis.xyz/maximum_flight_duty_periodyjkuc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gugamofizuxeg.epizy.com/brioche_roll_nutrition_information.pdfIn PDF document text
    • http://satawakerexe.atwebpages.com/laziv.pdfIn PDF document text
    • http://zepizokuxufo.rf.gd/which_of_the_following_is_not_an_example_of_an_internal_recruiting_source.pdfIn PDF document text
    • http://wajodojizofe.epizy.com/alberta_hunter_education_test_answers.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_off00011aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA4 5272 bytes
SHA-256: 768c8a71a915f8bef9f4e06c2f056cd86a43eca71eb44e365b2ac88d0b3326f2
font_01_sfnt_off00012c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C61 10248 bytes
SHA-256: 3246a7cbf79b8558327321a416521821867a074f0d9d43094c53d607afa19974

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