Malicious PDF — malware analysis report

Static analysis result for SHA-256 be2fa559b9b1cd6b…

MALICIOUS

PDF

84.1 KB Created: 2021-03-20 02:12:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 877c4f9ae882783e649a785952186cc8 SHA-1: d70f6dbc3efb40e105b8ab7d403e16c6da6fdd3e SHA-256: be2fa559b9b1cd6bf920030f791a98d19ce8c1b3f62cc9188548c70568866d7e
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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=star+wars+episode+8+trivia+questions+and+answers PDF link annotation
    • https://cdn.sqhk.co/jivazufevi/ihghhge/drones_live_wallpaper_iphone_x.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/hhmgM1Y/92582459373.pdfIn PDF document text
    • http://tokesuditetu.getenjoyment.net/mabedikotifijoj.pdfIn PDF document text
    • https://sizosunobefema.weebly.com/uploads/1/3/1/4/131453016/pawaxodu.pdfIn PDF document text
    • https://cdn.sqhk.co/fesoxuleri/jigKBhf/character_reference_letter_for_former_coworker.pdfIn PDF document text
    • https://pafetuvuwube.weebly.com/uploads/1/3/4/3/134321561/6647854.pdfIn PDF document text
    • https://cdn.sqhk.co/samanugutu/Ojavthb/jixumazififoda.pdfIn PDF document text
    • https://cdn.sqhk.co/polidupokasu/hjjptPi/96878789995.pdfIn PDF document text
    • https://buporinedo.weebly.com/uploads/1/3/4/0/134041533/widiwesifix-xixef-mozutu.pdfIn PDF document text
    • http://puduvab.sportsontheweb.net/advocates_remuneration_order_2020_kenya.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/woxojuxafopuv/tuwujo.pdfIn PDF document text
    • https://1347de4c-4e54-429a-b84c-372e60bc5a2b.filesusr.com/ugd/6c98bc_3728ffcb3759453ab6460f0cc3c2124f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sewamos/atomic_structure_worksheet_answers_4.1.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/the_biology_project_karyotyping_activity_answers.pdfIn PDF document text
    • http://tonavisuma.onlinewebshop.net/medical_insects_and_arachnids.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/vekojiwufuza.pdfIn PDF document text
    • https://adc67df4-9ac4-4169-8225-f8d60376216a.filesusr.com/ugd/a1c2c7_323eb0a3447f4a2aaa1ba5f23b038ee8.pdf?index=trueIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_8d1bbc7bbc2842048021b197d74001d3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gezetega/mujusima.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/un_syria_chemical_weapons_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/kozuri.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/como_fazer_backup_android_para_ios.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F3 5496 bytes
SHA-256: cb41ef3b33b22abcac09957d68128e997ae22e9427c1eb05008136b94afb4155
font_01_sfnt_off000107cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CB 11124 bytes
SHA-256: 4be52fecc4897872bf097bad8fa269c55d254747695c8717fdda20056f5325c6
font_02_sfnt_off00012da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA3 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e

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