Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d2f71b2a7432ea7…

MALICIOUS

PDF

81.9 KB Created: 2021-09-23 02:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7753b53059eec522d6df1eb86c30d9b4 SHA-1: 09fcf830d83a9422ba938e5a689cccfca7bdd543 SHA-256: 8d2f71b2a7432ea744f8a61b4f60d986774fb0e13dfbdac1f59122031f5e12ca
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, indicating it is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://cructi.ru/uplcv?utm_term=wwe+2k+for+android+download PDF link annotation
    • http://dkind.net/userData/board/file/dosojigapum.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/mp9sjno6s7sp9ccv6ph9rem5je/nedaxilakep.pdfIn PDF document text
    • https://valenciamaids.com/userfiles/files/21981570873.pdfIn PDF document text
    • http://union.travel/ckfinder/userfiles/files/86233246853.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/t7n8urgv5j0c5lh275p4eegrfc/kumigiw.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/161388d5c52b4c---zupuxopago.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/ganazejitaguj.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/82178703539.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/64020715948.pdfIn PDF document text
    • http://trivio.it/userfiles/files/42394305426.pdfIn PDF document text
    • https://comfort8889.com/upload/files/suragedoxexiroxexuruxi.pdfIn PDF document text
    • http://besteva.com/upload/files/wolejapawefasamugogobod.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/tiwivutewomepoxazexug.pdfIn PDF document text
    • https://wheelmartthailand.com/image/upload/File/68614927493.pdfIn PDF document text
    • http://synphabase.ch/upload/file/babikuditukogunelu.pdfIn PDF document text
    • http://velocimapper.com/webfiles/file/28045462202.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210922_222030.pdfIn PDF document text
    • https://www.caissedesecolesdu5eme.fr/backoffice/ckfinder/userfiles/files/9772489395.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/tanupikozotadiraxapakeg.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/fopizepofipilikebe.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/46917209832.pdfIn PDF document text
    • http://cukiernia.eu/upload/files/tozumibaxavepe.pdfIn PDF document text
    • http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/tisokowegibegodanofelewu.pdfIn PDF document text
    • https://rumahbaruku.com/contents/files/2739420089.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/pebolubikuwo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC128 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93A 20280 bytes
SHA-256: f764c8791128b98a0a0c23eea9fd355d3f979366eb107d12b05c8fb76c914565
font_02_sfnt_off00010c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5D 16164 bytes
SHA-256: a0f26d9ec2bc0bbc84dfb8c1a224a49f7f70479ac92e21d726acd811d43f3bd1
font_03_sfnt_off00012203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12203 10372 bytes
SHA-256: e997a2ea8bd90962f9f2da1d86d7b85d94bab762d5259089483e17306ad42848