Malicious PDF — malware analysis report

Static analysis result for SHA-256 316ce0b6661038cf…

MALICIOUS

PDF

76.0 KB Created: 2021-03-20 03:57:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 06f2ebbdbb2f153880594a232839eddb SHA-1: f15e21318e2b27667f1060a222681a7240080b7f SHA-256: 316ce0b6661038cf225bd0b7ae796dae1ac42ab9d348fb7cf28329d0731680ed
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO manipulation or redirecting users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to lead users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://botokaw.ru/wix?keyword=coolmath+grab+them+by+the+eyes PDF link annotation
    • https://novazoneb.weebly.com/uploads/1/3/0/8/130814043/toposa.pdfIn PDF document text
    • https://cdn.sqhk.co/fuludasowipu/XjbCsif/sacred_sword_princesses_characters.pdfIn PDF document text
    • https://kaxawoxo.weebly.com/uploads/1/3/1/0/131070710/tarizu.pdfIn PDF document text
    • https://cdn.sqhk.co/noxibogalu/djdvJKl/1248276568.pdfIn PDF document text
    • https://sefujokugitexas.weebly.com/uploads/1/3/1/4/131408298/bepupaguvigub_muwojoboka_wiwemuve_kalito.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/h82mhie/vinitipiwevamajobedugaxo.pdfIn PDF document text
    • http://movoxazukum.22web.org/tasks_status_report_template.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/biirggM/jikivifelo.pdfIn PDF document text
    • https://ruxikikigiligex.weebly.com/uploads/1/3/4/3/134347308/8172805.pdfIn PDF document text
    • https://xodamizefolan.weebly.com/uploads/1/3/6/0/136052243/kiwor.pdfIn PDF document text
    • http://bitividap.22web.org/nowowige.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/kokesatodixon/33531041279.pdfIn PDF document text
    • http://gujesuwekamore.epizy.com/13590812552.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/42664834208.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/global_automotive_industry_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/koxuromitisajalezatiwape.pdfIn PDF document text
    • http://zalaxorenisev.epizy.com/winning_chess_strategies_free.pdfIn PDF document text
    • http://wulevizoreb.epizy.com/1964_magnavox_astro-sonic_console_stereo.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_off0000ea3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3D 5248 bytes
SHA-256: 2f603a0690c907d5fae8d1b7316c4e8762752029083051bb0d45807b2cfbccef
font_01_sfnt_off0000fbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE7 10968 bytes
SHA-256: 858723ad36e7b87c88ad8c02c9f24fe6bb2e03d92ac1e6ba8a82709a772ebdb3

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