Malicious PDF — malware analysis report

Static analysis result for SHA-256 692f3699ed424186…

MALICIOUS

PDF

104.8 KB Created: 2021-03-02 13:30:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 99bc9c0c2483eef3a1d2ab561ebbfd48 SHA-1: 18adbac2ea0c4ab4b6e6eb29761ac763c367ea1c SHA-256: 692f3699ed424186d2c5f2674c815051cb2c003a65453e735a376d45b5e7c5d3
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 0.9998

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://baarspo.ru/strik?utm_term=how+to+recognize+each+mbti+type PDF link annotation
    • http://jukosulefutiwo.22web.org/how_do_i_connect_my_logitech_5.1_speakers_to_my_computer.pdfIn PDF document text
    • http://kiloritijuxat.iblogger.org/the_proper_care_and_feeding_of_husbands_quotes.pdfIn PDF document text
    • https://zoxexalibefan.weebly.com/uploads/1/3/0/9/130969973/zurorolad_seriwu_matarilaxezuwuf.pdfIn PDF document text
    • http://litamomun.22web.org/1034318326.pdfIn PDF document text
    • http://bivemipizejon.22web.org/is_mpje_harder_than_naplex.pdfIn PDF document text
    • https://numuladak.weebly.com/uploads/1/3/4/6/134613837/sugeg_lekutexodimir_burugunovev_fivejiwejapu.pdfIn PDF document text
    • http://vesimawamom.66ghz.com/why_does_my_dyson_dc44_keep_cutting_out.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/woxewiwupir/vawugapede.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/64957976575.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/what_are_national_and_state_learning_standards.pdfIn PDF document text
    • http://wukekikisowif.epizy.com/what_to_the_slave_is_the_fourth_of_july_literary_devices.pdfIn PDF document text
    • http://zawozunilutufu.rf.gd/artistic_handwriting_fonts_free.pdfIn PDF document text
    • http://diwukimip.epizy.com/nesikujobimibepa.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/reporte_circulo_de_credito_especial_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/jidalafonokebaxat.pdfIn PDF document text
    • http://mapureju.epizy.com/16402958715.pdfIn PDF document text
    • http://pejinubonuxus.epizy.com/poe_midterm_exam_answers.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_off00015e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E87 5480 bytes
SHA-256: 06e7b8560be1ac57d493ead77dfd904071c38b2a1da3fc4bfbb7e966f4c9fe45
font_01_sfnt_off00017124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17124 11024 bytes
SHA-256: cd112f7709e5c083fa384dcd7d3ea9fd0d31ecb02335dcf163d45ed3bd548990

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