Malicious PDF — malware analysis report

Static analysis result for SHA-256 d855ce63f29d38f9…

MALICIOUS

PDF

68.2 KB Created: 2021-09-29 08:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d2029958571784f13e8db6304bf7c928 SHA-1: 5ce55826ffb7d756d6d991a6a839a3162d7726c6 SHA-256: d855ce63f29d38f9b164719002d2d9ff81d684e74ad0df235955f087eb51e260
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to host numerous links, likely for phishing or distributing further malware. The ML classifier and ClamAV detection further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://coretry.ru/uplcv?utm_term=the+secret+path+book+pdf PDF link annotation
    • https://garmin10.ddbseven.cl/userfiles/file/kikowugazutok.pdfIn PDF document text
    • https://geloracinta.com/contents/files/22166722490.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/levolum.pdfIn PDF document text
    • http://condominiobrisasdelnorte.com/userfiles/file/taxajovobewiwaruv.pdfIn PDF document text
    • https://cqhuaan.myhost360.cn/upload/files/09-07-05-50-55-60.pdfIn PDF document text
    • http://acm-medicali.it/userfiles/files/65271767684.pdfIn PDF document text
    • http://peoplefoster.com/pliki/62996180788.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/najovibew.pdfIn PDF document text
    • http://globalroomplus.com/bot/ckfinder/uf/files/70894482770.pdfIn PDF document text
    • http://gyermekhaz.hu/Content/site_images/files/45998445192.pdfIn PDF document text
    • http://cuakeobinhduong.com/upload/files/79114416650.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161348f89c261f---zanotabatategavose.pdfIn PDF document text
    • http://fteq.ru/files/file/87790187967.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/soxorafesaregu.pdfIn PDF document text
    • http://clickvay.com/upload/files/xavewasi.pdfIn PDF document text
    • http://park-seversk.ru/other/js/ckfinder/userfiles/files/vajipadisona.pdfIn PDF document text
    • https://warungmimpishio2.com/contents/files/zotuwelilavezebi.pdfIn PDF document text
    • http://webs123.com/userfiles/file/bawus.pdfIn PDF document text
    • http://transchem-tech.com/Uploadfiles/files/91932157831.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153b507548cb---xejujidulegurefokozof.pdfIn PDF document text
    • http://cartopack.be/Images/file/49077892694.pdfIn PDF document text
    • http://saconsultancy.com/userfiles/file/12054159855.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_off0000ae77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE77 14516 bytes
SHA-256: 7815b4f8a41feec16b05fd19459effceef23a252e89a348ffcba41734bf913f9
font_01_sfnt_off0000d2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D8 10672 bytes
SHA-256: e603a3f33cba0b59abb47b5aebb0790ac6619b2974be59c167522578991cea7d
font_02_sfnt_off0000eb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.