Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2968cc8e009aae6…

MALICIOUS

PDF

86.3 KB Created: 2021-09-10 13:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8eb15f74bd289d1bc4787051f7e3ebd9 SHA-1: d52a60fc8153e756eb14def29392a1508c700b11 SHA-256: b2968cc8e009aae631b283cb51138b6c8d8e8d904dbb263d23b28b3259cc52c7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also exhibits characteristics of a link farm, with numerous distinct hosts and disposable links, suggesting an attempt to obscure the ultimate destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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 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://iphonerepairservice.nl/app/webroot/files/userfiles/files/38910697081.pdf In PDF document text
    • http://mobilni-kadernictvi.cz/files/file/junizidagi.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202109081008038116.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210904031409.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1631103302.pdfIn PDF document text
    • https://taperagi.com/contents/files/jamakodeguvatodobaji.pdfIn PDF document text
    • http://humidorio.de/ckfinder/userfiles/files/najexaxogebofegilaraxov.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161387d3c676da---67828076989.pdfIn PDF document text
    • https://servicepapik.ro/files/30278565557.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/40816291879.pdfIn PDF document text
    • http://k-ookuma.com/js/upload/files/suxorubojorefu.pdfIn PDF document text
    • http://www.videocopilot.net/assets/public/ckfinder/userfiles/files/97436734587.pdfIn PDF document text
    • http://dpsnowodworze.pl/userfiles/file/fujokolewenorar.pdfIn PDF document text
    • http://envigest.cz/upload/file/95563457048.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613634c3d28ed---benami.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/11800622234.pdfIn PDF document text
    • https://o-dance.com/upload/files/xovulekoxadajawusif.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/35453762034.pdfIn PDF document text
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/dafakurejorupivubuvek.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/19282757083.pdfIn PDF document text
    • https://kaptenhoki.net/contents/files/714370881.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/dovidunifoxuwabevedupazi.pdfIn PDF document text
    • https://lecachet.fr/docs/files/labegezegeluk.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/bopolivumulaw.pdfIn PDF document text
    • https://maytinhdalat.vn/images/uploads/files/kapikisifufovizafudujub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=booksmart+123movies+full+moviePDF link annotation
    • 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_off0000e6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DA 10924 bytes
SHA-256: 38d673fb80ff4951a8fc6c5f9d6204adbef9bd25bc5f4d9b3939cc1840cdf41b
font_01_sfnt_off00010067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10067 19140 bytes
SHA-256: 0d7384694493165d895b9a3f547797f06bb73c61b31a4ea076bbba78fd339c49
font_02_sfnt_off00013198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13198 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1