Malicious PDF — malware analysis report

Static analysis result for SHA-256 d016b01d2b9429d8…

MALICIOUS

PDF

83.0 KB Created: 2021-09-09 18:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 015bd2b6993d85f1ad142d71608947ef SHA-1: aeb01e766579103f497def25579f29b901f6767a SHA-256: d016b01d2b9429d8f5a68e47cd74162b101f31f75618f90e831092b9c528aa36
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous URLs that form a link farm, pointing to compromised websites and disposable hosting. The primary purpose appears to be redirecting users to malicious content, likely for phishing or malware distribution, leveraging the embedded JavaScript to facilitate this redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=new+web+series+free+watch PDF link annotation
    • https://tutorlookup.com/ckeditor/ckfinder/userfiles/files/15870440200.pdfIn PDF document text
    • http://vlajkylevne.cz/UserFiles/File/zalolu.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/78898122660.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16130fd71e9c6f---97523883563.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/kojewopufizawos.pdfIn PDF document text
    • https://nileagriculturalindustries.com/file/nelopemowupitimonitifag.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/rulem.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/zekuxuguja.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/47935098277.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/wigasubiziv.pdfIn PDF document text
    • http://thanhcongtechtra.com/upload/files/30682574168.pdfIn PDF document text
    • http://garmaclima.com/uploads/ckfinder/files/99010663486.pdfIn PDF document text
    • https://perfumes.dropship-tracking.com/userfiles/files/lifizojujupef.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16133e89bd4e66---kaletapo.pdfIn PDF document text
    • http://sinsg.com/files/fckeditor/file/41523353997.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/sidiwabesalazufa.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/5950e965278d57cc9b9734d3928c38b6/20312502844.pdfIn PDF document text
    • http://elitacasa.it/images/file/sixus.pdfIn PDF document text
    • https://istanajp.com/contents/files/11962839275.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c6cfe25d7---49534094268.pdfIn PDF document text
    • https://s-h.cc/uploads/files/202109081552379088.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/zuxukubotosewegizele.pdfIn PDF document text
    • https://pu-sk.com/app/templates/js/ckfinder/userfiles/files/zididuwovakatuzowagakagis.pdfIn PDF document text
    • https://dortmundpools.com/contents/files/94775072699.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1613388f77fe9d---rakenidajilabafubatu.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210905_025D96611DF75EA4.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_off0000e286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE286 10368 bytes
SHA-256: b4eaa193fead346329577e95349169c618a003e4e2994877170d5608cd86866b
font_01_sfnt_off0000fa2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2C 17088 bytes
SHA-256: 5d904d18f3cbd459ed3bf837c725d18f4aed86017213ff4e9c4f175a4d42468c
font_02_sfnt_off00012666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12666 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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