Malicious PDF — malware analysis report

Static analysis result for SHA-256 3596459e636567d0…

MALICIOUS

PDF

73.2 KB Created: 2021-09-19 08:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 392e324085f8236fee53143efddc8464 SHA-1: 391a73cd98f5dbde878db86bf38ccd1997c1525a SHA-256: 3596459e636567d0c5bb04b5f0b4d0db07e321af5e6ffcc06d9ebca438400c03
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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://philabc.ru/uplcv?utm_term=jattan+de+tractor+tochan+game+download PDF link annotation
    • http://uniondrygoods.com/fckeditor/userfiles/file/rujipejirogut.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/zidutotupi.pdfIn PDF document text
    • http://masonhn.com/d/files/89226178558.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/161468f3e5faf4---39984640976.pdfIn PDF document text
    • http://grupophi.es/uploads/files/43282648470.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/36003389198.pdfIn PDF document text
    • http://mega.kz/media/upload/files/vujuzafujizemawalume.pdfIn PDF document text
    • https://webkapper.nl/ckfinder/userfiles/files/nopadulobom.pdfIn PDF document text
    • http://kubak-ubezpieczenia.pl/userfiles/file/povulepukilerowagureme.pdfIn PDF document text
    • http://www.nagsa.es/ckfinder/userfiles/files/jivawilebifulu.pdfIn PDF document text
    • http://skulpt.in/admin/uploads/file/90358656854.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161301aea08d6e---12554566901.pdfIn PDF document text
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/nasabesesi.pdfIn PDF document text
    • http://taispacedesign.com/upload/files/kuxila.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/xosibotenagasugel.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/hgtkodg99aedpcam87pd3e9452/46805039763.pdfIn PDF document text
    • http://caffepontoni.com/uploads/file/79364511128.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16141d1a629c9d---najaxezubeg.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/lolepatopi.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16145c4112c0bf---lisorotiketulorodegijikuz.pdfIn PDF document text
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/romefujawajimepuperabit.pdfIn PDF document text
    • http://generaldistco.com/images/file/84952854253.pdfIn PDF document text
    • http://bonsite.nl/phpcmsys/file/34015583922.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/zumabujewejuge.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/dovulipowi.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_off0000bce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE6 16416 bytes
SHA-256: 5fe9827fef5f0ca746b5bef450b3e71c3432c31be76f775ab6db3ca0690db92c
font_01_sfnt_off0000e6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E8 10636 bytes
SHA-256: bedaa48537584bec48150b1c3002a17f7c3e5c0131c64b3c688f78efbf5e28c9
font_02_sfnt_off0000feeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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