Malicious PDF — malware analysis report

Static analysis result for SHA-256 25eaaea00027d179…

MALICIOUS

PDF

68.6 KB Created: 2021-09-26 15:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 32a97bffd134079ea2bf91d3f1ba9b8a SHA-1: d6e3363860e3ff4e0ae269f682791704fc356742 SHA-256: 25eaaea00027d179eec2025986c974c0391a6b2a68c55644106cf92a0b5c9df4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to a link farm hosted on various domains, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 http://gerd-pollak.de/userfiles/file/ruwawexumabusawubikajiz.pdf In PDF document text
    • http://abogarestudio.com/userfiles/file/16243000656.pdfIn PDF document text
    • http://kortennis.co.kr/B/ck/ckfinder/userfiles/files/2246808905.pdfIn PDF document text
    • http://k9careclinic.in/ckeditor/ckfinder/userfiles/files/wekulavolipiworidovunikaj.pdfIn PDF document text
    • https://www.esfa.bg/root/ckfinder/userfiles/files/mezofuvog.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/bovulimapafatilajimotig.pdfIn PDF document text
    • https://thaibamboorestaurant.ca/phpsites/bard_ford/uploads/file/vepigemabu.pdfIn PDF document text
    • http://labsshop.com/d/files/81677687683.pdfIn PDF document text
    • https://seedomoretravel.com/files/files/novavakavog.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/b24eed42b006fd4ecb184af310d3b09c/rogoti.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/labeno.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/97575446376.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/22175225065.pdfIn PDF document text
    • http://sdsenlex.com/upload/files/josazulalekofobuwezojevi.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16141d99ca4c38---10347009518.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/zarolasikiwuxatenugu.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210919_89A889B781A2FA7B.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/xofiwuriwatowop.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/jetupazikufelokozibenebew.pdfIn PDF document text
    • https://linker.tw/files/pitelumejitimoxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=kodi+app+for+android+phonePDF 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_off0000ab19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB19 10272 bytes
SHA-256: ebc46d5a97cc1b6ecb3773d18dcaa41e352cd689eb49a5700de03cafc14c0437
font_01_sfnt_off0000c20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC20D 16824 bytes
SHA-256: 96b8e970aab4e2aad855523f4a8c4f96c0eb7d19a5d9131681e4630e3d9f3fd9
font_02_sfnt_off0000ed93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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