Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba6ed935e6e532bb…

MALICIOUS

PDF

76.2 KB Created: 2021-03-15 12:38:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d4ff5950c8555be24f6ee4c63d933e53 SHA-1: 8ca7c206704cf4d12366d710d89bc3270a025467 SHA-256: ba6ed935e6e532bbf672eb8b1f8ec2a7ca13149356032ce088b88d88a8076c6c
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=eighth+of+weed PDF link annotation
    • http://ranupila.mywebcommunity.org/dolobavipedabesevoninu.pdfIn PDF document text
    • http://roboludawu.mywebcommunity.org/what_is_the_rarest_hair_color_with_green_eyes.pdfIn PDF document text
    • https://katudiwuf.weebly.com/uploads/1/3/6/0/136006549/dekuzudafigelutapagu.pdfIn PDF document text
    • https://nodirerivono.weebly.com/uploads/1/3/6/0/136052085/fd72b09a5a89.pdfIn PDF document text
    • https://tofejigijo.weebly.com/uploads/1/3/4/3/134312142/5348197.pdfIn PDF document text
    • http://linodogeb.scienceontheweb.net/que_es_la_inteligencia_psicologica.pdfIn PDF document text
    • http://fezivexem.iblogger.org/83765025563.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vuxebezedigelun.onlinewebshop.net/dremel_3000_rotary_tool_130w_rotary_multi_tool_kit_with_15_accessories.pdfIn PDF document text
    • http://bikuxawas.epizy.com/que_es_mecanica_automotriz.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/source_code_pro_bold_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/25863412131.pdfIn PDF document text
    • http://duzunop.rf.gd/hello_neighbour_act_3_guide.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/nokodinojisaguvigumonew.pdfIn PDF document text
    • http://nabulegewuwal.myartsonline.com/motorola_radio_charger.pdfIn PDF document text
    • http://limufij.myartsonline.com/how_to_cure_bad_breath_permanently.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/pezemab.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/scientific_calculator_java_app.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/odia_new_movie_song_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/accident_incident_report_form_qld.pdfIn PDF document text
    • http://sekuwomexapa.myartsonline.com/hobart_meat_slicer_model_1612.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_off0000ec69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC69 4700 bytes
SHA-256: 2a0431037dbbd6659e62ae9c2f07e878db4133241fba040a7718ec92c43f38c2
font_01_sfnt_off0000fc86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC86 11332 bytes
SHA-256: 347d050db36d74fb318f8a89ffa792dbfed64ad01603f1f959bf9759891484c3

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