Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee00e36cf4f890d3…

MALICIOUS

PDF

89.4 KB Created: 2021-03-14 17:41:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: df93d29bad0a7bc3c67105942d23e771 SHA-1: e51d364cd53459e663e47908d44d5deb73be8fd6 SHA-256: ee00e36cf4f890d32acec755e53405b7d435801d087d57fe31defc8a71489279
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 PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, and the ML classifier and ClamAV detection confirm its malicious nature. The embedded URLs likely serve as a distribution mechanism for further malicious content.

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://xajibur.ru/award?keyword=tales+of+mystery+and+imagination+edgar+allan+poe+pdf+espa%25C3%25B1ol PDF link annotation
    • http://gouliwer.online/bozuwmnvfg.pdfIn PDF document text
    • http://remontnatali.ru/bunomepamew23oxc.pdfIn PDF document text
    • http://magonawaneku.22web.org/adobe_premiere_tutorial_transitions.pdfIn PDF document text
    • http://bomawowaziwan.iblogger.org/red_blue_and_yellow_makes_what_color.pdfIn PDF document text
    • http://vienvozvrat.site/fawumibajolewuratimefg15o1.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
    • http://foligebo.rf.gd/15353842850.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/dha_bahawalpur_application_form_last_date.pdfIn PDF document text
    • http://wixarebetiz.epizy.com/45690899756.pdfIn PDF document text
    • https://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_91970ab18775468cb158121e9d764d1b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/womupit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ed9629c-0d93-4212-aece-e4d1d19dd242/how_much_does_it_cost_to_produce_a_tv_show_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/wuribovutaxinumutomopos.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/baishe_srabon_bengali_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/new_bollywood_movie_mkv_file.pdfIn PDF document text
    • http://pakoxerevigere.epizy.com/ruwubafepetikanugatupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58d81bb4-5144-425e-968f-4ceca70e62f8/la_familia_de_pascual_duarte_movimiento_literario.pdfIn PDF document text
    • https://02664c88-84e5-42fa-aae3-682d3a0d4328.filesusr.com/ugd/39d081_612b39943df747d099eaa4a4693ede25.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wukara/biodegradable_plastic_from_corn_starch.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/tixibatatiwivaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/default_root_password_kali_linux_2.0.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_off00010e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E68 5412 bytes
SHA-256: 8f61466005dae8793045b487695dfcc4fed7c43c645cb3fd0b94f40bce9d5435
font_01_sfnt_off0001207c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207C 11440 bytes
SHA-256: a2fa688a4ffb529a49eac7ed2f7242f9ee459e630a8d9d71aaa3b05ca4aae272
font_02_sfnt_off000146ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146AD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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