Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee2084b5fc4f1f5…

MALICIOUS

PDF

91.6 KB Created: 2021-02-17 09:14:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 71351194c2a811cd8a135b2df7773557 SHA-1: 63682ff4accf98e808363aea9a453990b3859de3 SHA-256: cee2084b5fc4f1f5feb55e7a5828d20ee12b3a3364105f611e59ecd6dbe47ea9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs, such as 'https://jacksth.ru/wix?keyword=sat+registration+deadlines+2020', are designed to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/wix?keyword=sat+registration+deadlines+2020 PDF link annotation
    • https://cdn.sqhk.co/kososojog/iehaTic/daxuwinuzu.pdfIn PDF document text
    • https://noduxulab.weebly.com/uploads/1/3/4/9/134901810/tawifesanabutozira.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390382/normal_5feb8ac572908.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385206/normal_6001ec5253629.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/jicehiu/37453856984.pdfIn PDF document text
    • http://axecheat8.xyz/keynote_powerpoint_templates_freejwrra.pdfIn PDF document text
    • http://manybigs.space/45054774028093ga.pdfIn PDF document text
    • http://eslivdrug.space/98934796437p87u3.pdfIn PDF document text
    • https://fotunerabo.weebly.com/uploads/1/3/4/0/134042859/6456184.pdfIn PDF document text
    • http://trickyturkey.com/21101258148yq002.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447253/normal_5fcdc3d59423e.pdfIn PDF document text
    • https://bovikobugekut.weebly.com/uploads/1/3/0/7/130775803/popifononekurugazu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450730/normal_5fe8b8c6dff0c.pdfIn PDF document text
    • https://cdn.sqhk.co/zofonabiz/vsib5ih/mesazijuxidonuvijek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495855/normal_5ff59be50bb15.pdfIn PDF document text
    • https://cdn.sqhk.co/depifozopupe/kgfEjji/guide_for_pixel_gun_shooter_3d_survival.pdfIn PDF document text
    • https://xewulowew.weebly.com/uploads/1/3/4/7/134757629/ginobono.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_601e5a6cd3c5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412378/normal_5fcf4c015979f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460983/normal_5fe25531291e7.pdfIn PDF document text
    • https://cdn.sqhk.co/xazururoxe/ajg9a9M/vukasumiretovej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dakebesuvum/fire_burning_sound_effect.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/arial_rounded_mt_bold_font_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C27 5160 bytes
SHA-256: a32aca4ce2a1f3fafc6e76774cfbefdc28c6b219cfb1665aa356c9f32f76645a
font_01_sfnt_off00012da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA8 10872 bytes
SHA-256: 8bbcae6b64ff5c3ea73398bc2348a89f1331568b62cafdf6c908119a3074cb24
font_02_sfnt_off000152a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152A5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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