Malicious PDF — malware analysis report

Static analysis result for SHA-256 79d4dd60feac4d75…

MALICIOUS

PDF

78.3 KB Created: 2021-09-03 19:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 48edfebc743d49e84487f7815a918513 SHA-1: d4684ba39b0e379c937921e48eeb8dc90d5e752c SHA-256: 79d4dd60feac4d75ad66cda0ea74843069782105a507ad9b67500e73187953b5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with a high probability of being malicious. It contains numerous embedded URLs pointing to external resources, suggesting it is part of a phishing campaign or a downloader for further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • 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.
  • 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://krisoc.ru/uplcv?utm_term=scanner+canon+lide+100+manual PDF link annotation
    • http://boxerdapolenta.com/cmsimple/images/file/noluledizukud.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents//files/1974417024.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/90326545937.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/ratexebanete.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/lugepuvarugeru.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff7a41c506---95873654718.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/3141177776.pdfIn PDF document text
    • https://franciscojaviermoreno.com/DocsCKeditor/files/refiru.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/rf5b0ladv0408j4j63s8cl7vj6/94195703788.pdfIn PDF document text
    • http://orsolyajuhasz.com/ckfinder/userfiles/files/zumavopu.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/25425909812.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/50822193586.pdfIn PDF document text
    • https://davaocarrental.com/images/file/sufop.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/90764434392.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/34264836688.pdfIn PDF document text
    • http://myblindz.com/fck_user_files/file/renafobazojefesenawexo.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/dokasovem.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/tajalogamanifuvu.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/32570568269.pdfIn PDF document text
    • https://rumahbaruku.com/contents//files/ravasimemugewibov.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/vemakipo.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/9621744994.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_off0000c906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC906 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE118 18532 bytes
SHA-256: a573475ba12e967db51fb179716451dcb1e0eb5809439ac526aaeee5ea7b71de
font_02_sfnt_off0001118e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118E 10616 bytes
SHA-256: 8a6f3a612c93853e24fafc5a76cd0c96770792c6bf9ab2ef15935e96c0030c2a

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