Malicious PDF — malware analysis report

Static analysis result for SHA-256 2de4135646f99814…

MALICIOUS

PDF

101.4 KB Created: 2021-02-15 09:03:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 91f4a1eb6383b79c4c694ea977fd9df0 SHA-1: d8f4f42c6df41a21b3202b654b8f7eb2093c912b SHA-256: 2de4135646f998143a26730a69d4d026f6203c0d09116749f01b778532499d6b
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 phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' indicate the document's primary purpose is to redirect users to external sites, likely for credential harvesting or malware distribution.

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://druttle.ru/123?utm_term=the+god+they+never+knew+pdf PDF link annotation
    • https://gorejirulikem.weebly.com/uploads/1/3/4/7/134738880/sivejusefep.pdfIn PDF document text
    • https://segawalapuk.weebly.com/uploads/1/3/4/9/134902876/961dbecca8f2e.pdfIn PDF document text
    • https://jirogadipew.weebly.com/uploads/1/3/1/6/131606393/jebitesuw_pezigaz.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/darisude_rinometefebunu_jefoladum.pdfIn PDF document text
    • https://dipitamadupod.weebly.com/uploads/1/3/4/8/134882687/4989951.pdfIn PDF document text
    • http://lefegesitorezod.iblogger.org/not_a_barbie_girl_ringtone.pdfIn PDF document text
    • https://vawudida.weebly.com/uploads/1/3/4/8/134890241/sepawinimuzeve-bewobuluse-xesovuvivetabuv.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/sevoga/89413306573.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/falkirk_council_report_anti_social_behaviour.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/ardaas_karaan_movie_filmyhit.pdfIn PDF document text
    • http://zowadakal.epizy.com/11303288002.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/automobile_engineering_books_in_tamil_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/anatomy_and_physiology_2_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/binomial_expansion_worksheet_with_work.pdfIn PDF document text
    • http://podaviloridi.rf.gd/48604427267.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/82368390715.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/chase_amazon_card_guide_to_benefits.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/43269121319.pdfIn PDF document text
    • http://pufawalaxovosi.epizy.com/brach_s_jelly_beans_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/edit_crystal_reports_in_visual_studio_2013.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_off000144bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144BD 4888 bytes
SHA-256: ca11e2db30f48d2c54dce160510a3f330400abb91612b95c10c22ea786cd88f1
font_01_sfnt_off0001556f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1556F 10652 bytes
SHA-256: 6d4b75aadb35e3cc50c70eaef97e7130180c1cfd435cd7bd07e48e690cbe81ce
font_02_sfnt_off000179d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179D4 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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