Malicious PDF — malware analysis report

Static analysis result for SHA-256 6075dfea8f1650f8…

MALICIOUS

PDF

74.7 KB Created: 2021-09-13 19:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: a6f6cfd7ba325cd92c009dc139f0afe7 SHA-1: b55921688278063e262bc25299159442c12b038a SHA-256: 6075dfea8f1650f8818e381e014c09bccd576cddfba9693d314eb8cd5915623d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and redirects to a URL that appears to be a lure for downloading content, indicated by the 'boruto+manga+download+pdf' parameter. The heuristic firings, including ML and ClamAV detections, strongly suggest malicious intent, likely to deliver a phishing or malware payload. The embedded JavaScript is a common method for exploiting PDF vulnerabilities to execute malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

Heuristics 6

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://infrive.ru/uplcv?utm_term=boruto+manga+download+pdf PDF link annotation
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/23133076773.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/82870201666.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/jiwujamiminapenedazox.pdfIn PDF document text
    • https://dp-engineers.com/admin/userfiles/file/junur.pdfIn PDF document text
    • http://guowangcable.com/d/files/76488558880.pdfIn PDF document text
    • http://lsbwg.com/ckfinder/userfiles/files/20210912/1044053431.pdfIn PDF document text
    • http://ankaraeksioglu.com/resimler/files/sifosukubotakebedat.pdfIn PDF document text
    • http://henca.com/files/details/file/63972336264.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613950ac7ff4d---nalulasanobinur.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/gukuxovujivus.pdfIn PDF document text
    • http://greathorserider.com/ckfinder/userfiles/files/safodumu.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/71193036174.pdfIn PDF document text
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/29388982638.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/meluvamilugabe.pdfIn PDF document text
    • http://thegioixedap.net/upload/files/kazekonixirozevasusanov.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/55464986564.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/2320186087.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/5746797965.pdfIn PDF document text
    • https://dolaodong.com/userfiles/file/10610376881.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/66454158130.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/6221120220.pdfIn PDF document text
    • http://studiodugnani.it/userfiles/files/rixadawiximexe.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/99283479539.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/59255525624.pdfIn PDF document text
    • http://zjgyuanhong.com/v15/Upload/file/202191033695884.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/13ae23f8658a9c63fb3e1b7f9eeb6bae/kusox.pdfIn PDF document text
    • http://jd6618.com/jd6618/file/2021-9/file/LwpCms2021_09_02_19_04_03_5657.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF14 10688 bytes
SHA-256: cf0de016f4bcc15b8a2f03a9ad995ea7db849c4e8aa74f386b1d45650aef17d4
font_01_sfnt_off0000d772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD772 17364 bytes
SHA-256: 477999bce2bf2315674ccbb3e03d450d35541d610c1818e38c1a7336d4b460e9
font_02_sfnt_off00010503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10503 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1