Malicious PDF — malware analysis report

Static analysis result for SHA-256 246e63830d7becf7…

MALICIOUS

PDF

73.9 KB Created: 2021-01-23 02:22:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a62882d0bc677d02cb72c98aa17a221d SHA-1: cb9ffb44df6a2aab5f52548ad18289b4bb099661 SHA-256: 246e63830d7becf71e193509d8c4c833d761bce26a6e7f710d961a302397c41b
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to PDF files, indicating a link farm or SEO spamming attempt. The primary URL, 'https://seumenha.ru/123?utm_term=raiz+cuadrada+de+20', suggests a lure related to a mathematical query. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/123?utm_term=raiz+cuadrada+de+20 PDF link annotation
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/8ab78.pdfIn PDF document text
    • http://kigowamukidiba.iblogger.org/85497467498.pdfIn PDF document text
    • http://fulusixavopowem.iblogger.org/hemochromatosis_guidelines_2017.pdfIn PDF document text
    • https://kokopepexepu.weebly.com/uploads/1/3/1/3/131379351/5cba133b.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/juzewojavomofew/wodujotiluwusun.pdfIn PDF document text
    • http://lizomepikoxi.epizy.com/tidegiwatu.pdfIn PDF document text
    • http://kanisal.epizy.com/beautiful_houses_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/didawana.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/37188337561.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/76478936968.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/prestige_chimney_manual.pdfIn PDF document text
    • http://rixuzomobe.epizy.com/abp_maza_news_video.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/adobe_premiere_pro_cc_free_effects.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/cordoba_spain_travel_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/preparation_of_cellulose_acetate.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/jojeriwenifuw.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/phonics_sheets_grade_1.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/delicate_lyrics_video.pdfIn PDF document text
    • http://dovobol.epizy.com/live_wallpaper_for_android_mobile_nature.pdfIn PDF document text
    • http://genenapukiral.epizy.com/wilanifamujubumevawupuned.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/asia_map_test_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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE8 5052 bytes
SHA-256: c03b2c39455ab8144066eea31dd4ebfe04297b4a874142358d19fdd4e766f555
font_01_sfnt_off0000e02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02E 10636 bytes
SHA-256: 027c7d1332add0e82b2607028a617e76e249dc4cfedf612fc0807f15392fdfec
font_02_sfnt_off0001038b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038B 16168 bytes
SHA-256: d05f37f1530d5f93420ec1d1fef03be40ff404ab4da44f5daae16fd0829d120f

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