Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d951658a12ab99…

MALICIOUS

PDF

80.4 KB Created: 2021-03-31 01:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4297f721c649b895b56f88cc452d9826 SHA-1: 5ef00ce236f7776d1f1b6a336a99aab0f598099d SHA-256: b2d951658a12ab999af5e24b63d9ea1e684be4bd29470a45e4eea3b8365f0c1f
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, specifically flagged as a phishing trojan. It contains numerous embedded URLs, with one prominent external URI pointing to 'druttle.ru', suggesting a phishing or malicious redirection attempt. The PDF structure and embedded content indicate it's likely a lure to a malicious website, potentially for credential harvesting or further payload 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://druttle.ru/wix?keyword=terra+xehanort+fight PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4428045/normal_5ffca17097bc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502817/normal_604343f273562.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/rajopumapa.pdfIn PDF document text
    • http://kevifiregerufug.scienceontheweb.net/xoledagokojasipenebi.pdfIn PDF document text
    • http://tugalakalat.22web.org/2020_and_2020_broward_school_calendar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483354/normal_6022b7f3d40e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472788/normal_60257d188f43e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ea2e2e9-890a-4ed0-b0df-178e2809efef/canon_canonet_ql17_giii_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/217b5670-9a4c-4baf-bce3-67376f537d5a/does_vshred_work_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/12627227048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02b2dd52-795a-45e4-a9c1-238982103a55/omnifilter_u25_filter_wrench.pdfIn PDF document text
    • http://pofebevasusin.rf.gd/cahiers_du_cinema_espaa.pdfIn PDF document text
    • http://wowadepadon.rf.gd/47337307425.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/how_to_apply_levenes_test_in_spss.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/adobe_audition_cc_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/novaluwupurigesizita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60176c8a-4e6c-434c-a3cc-b0b213ab3a7b/what_does_a_jumping_spider_bite_feel_like.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/rixuratu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4719741e-b016-4223-915c-0fc1607a0e38/doubledown_casino_slots_games_itunes.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_off0000ff38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF38 4836 bytes
SHA-256: 65144131057303600273fbde8849efc73b8b31a3cec99c2c6004ea05f0511c3a
font_01_sfnt_off00010fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB1 10892 bytes
SHA-256: b639669ec53ea3bcdf79431325aeaff851a5237089f2da34848cea59f4205556

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