Malicious PDF — malware analysis report

Static analysis result for SHA-256 60487012a00d19e3…

MALICIOUS

PDF

83.1 KB Created: 2021-09-15 20:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 27d98acc0cf7af2030983fa5c31aefca SHA-1: af4848d8f11374aad4409bdcffc22a99e10494b3 SHA-256: 60487012a00d19e387d57a4db906afbafe2ba7695a760d2cdfbcd0d4c5f38ed6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the nature of the URLs and the 'link farm' heuristics point towards an attempt to exploit user interaction via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://drafthe.ru/uplcv?utm_term=one+piece+stampede+english+dub+watch+online PDF link annotation
    • http://sperrincaravans.com/images/file/16762673241.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130cb1ebd685---tavilekevido.pdfIn PDF document text
    • http://avrig35.ro/uploads/fck_editor/file/xiwawidilumagadonagutage.pdfIn PDF document text
    • http://moutierrozeille.fr/userfiles/file/peleto.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/161301267c299b---regoruv.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/kafafujegarutebi.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/kifutizupinederuzojadu.pdfIn PDF document text
    • https://abss.pt/userfiles/file/39018689706.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/99fd4dfe003918aad9ee46bda765a8e2/vuwinitanozodozu.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/libonasojuxiroxetap.pdfIn PDF document text
    • https://infotechsystemsonline.com/ital/www/img/file/18653501611.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/wemopiwavazat.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/7435199470.pdfIn PDF document text
    • http://banner-ever.com/ckImg/files/86245313156.pdfIn PDF document text
    • http://ohmytour.kr/FileData/ckfinder/files/20210904_2CAA9E28DEF9B18C.pdfIn PDF document text
    • http://www.photonics-science.com/ckfinder/userfiles/files/3369410286.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/kemiduxamapawonakix.pdfIn PDF document text
    • https://webmenuplus.com/images/file/18983269043.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9131b46cc---56118121001.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/72750151726.pdfIn PDF document text
    • http://bananamusic.tw/uploads/files/202109071918577914.pdfIn PDF document text
    • https://lighthousemacau.com/html_upload/file/25963171861.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/dolape.pdfIn PDF document text
    • http://kiapelhrimov.cz/UserFiles/File/95341845863.pdfIn PDF document text
    • http://rowadhr.com/app/webroot/upload/files/51930576208.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_off0000de26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE26 11212 bytes
SHA-256: 6bef25854ad6a2f278d2a191dd75aa5f027cc185113fc977ef11e6e8e50be811
font_01_sfnt_off0000f7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DF 18340 bytes
SHA-256: 66ab6b827312629400a26f53d6e8629f4da139f1bedb5c44d4a11e8c67f3d06a
font_02_sfnt_off00012835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12835 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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