Malicious PDF — malware analysis report

Static analysis result for SHA-256 791b486a0e8dcb39…

MALICIOUS

PDF

85.7 KB Created: 2021-03-05 08:59:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 24aa0f70d3996cb21b36f1fdc39cafe7 SHA-1: e2f8271acbfb8e23b4339b7749180bb08c6b983f SHA-256: 791b486a0e8dcb39a23901fa0096584d783db9706245cbdaa3e330fde5da6cfe
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains numerous external URIs, with one prominent link suggesting a reward related to a search query. The document's structure and the presence of many links on disposable hosting indicate a link farm designed to redirect users to potentially malicious content, likely a phishing or scam page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/award?keyword=yard+machines+132cc+gas+lawn+mower+20-in PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379229/normal_5fdb5478dd888.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366633/normal_5fcf47f692d3c.pdfIn PDF document text
    • http://lagujegivupani.22web.org/formal_apology_for_late_reply.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460466/normal_5fe99ea77dd3b.pdfIn PDF document text
    • http://babudategajuzul.iblogger.org/bubeximakakajerer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369901/normal_5fee77ab81e51.pdfIn PDF document text
    • http://zovofuti.mygamesonline.org/gas_wall_heater_gas_valve_troubleshooting.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/83913097461.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393028/normal_602cd69fc9704.pdfIn PDF document text
    • http://nitanupemil.mygamesonline.org/6898357629.pdfIn PDF document text
    • http://newigatop.22web.org/53453457572.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/lixuzo/musifepa.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/disadvantages_of_non_probability_sampling.pdfIn PDF document text
    • http://wusanobe.rf.gd/muxusorexamaxokiseviw.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/kopasitiperoko.pdfIn PDF document text
    • http://mejojaka.epizy.com/number_format_js_php.pdfIn PDF document text
    • https://7a3463bf-3117-47cc-940f-ad9d50d05675.filesusr.com/ugd/9f2514_3a01c9c84e89470a951ad6c7d1dffb28.pdf?index=trueIn PDF document text
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_337c7350c3b24730bec53f1f4584c7ed.pdf?index=trueIn PDF document text
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_94a959205b874d729105530ad608eedd.pdf?index=trueIn PDF document text
    • http://zenutetuzobo.epizy.com/kubak.pdfIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_bc207f93dbaa48ecbf1fd403971c7b41.pdf?index=trueIn PDF document text
    • http://getetir.epizy.com/how_to_get_the_true_ending_in_sao_fatal_bullet.pdfIn PDF document text
    • http://fovawipemezipu.myartsonline.com/gekenosimedamijev.pdfIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/how_to_lose_belly_fat_indian_diet.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_off00011153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11153 5928 bytes
SHA-256: f352cb77b83c6adf7359aa29915a33852f52f3992cf69c1dd4e3898f68b356c7
font_01_sfnt_off00012578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12578 10476 bytes
SHA-256: 241db2574a583ea4d31079eb06dacfa68cda3ed5b4c22a630979c979a75b9b90

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