Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a3ab2d99925a816…

MALICIOUS

PDF

83.1 KB Created: 2021-09-17 04:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 863cb4e65df70e264d58fd2c9dda21e8 SHA-1: 886e5fdf53bf71557901533800a505664afb31f1 SHA-256: 9a3ab2d99925a816b92d4a480c05fba0866581b4be3e54892b347d47b0b81793
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the PDF functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS uploads or disposable domains. The embedded URLs suggest a phishing or malicious content delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pcparts.fr/ckfinder/userfiles/files/14346840424.pdf In PDF document text
    • http://kondicionery-fryazino.ru/upload_picture/file/44770542225.pdfIn PDF document text
    • https://houstoncoinclub.org/FCKeditor/file/lajuzolisikobuputobifo.pdfIn PDF document text
    • https://www.temtechnologies.fr/ckfinder/userfiles/files/poperiwudotebapuweravede.pdfIn PDF document text
    • http://instit.ac/ckfinder/userfiles/files/26548248769.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614057a8926a2---51642697698.pdfIn PDF document text
    • http://majstrissmt.eu/www-data/file/7056532367.pdfIn PDF document text
    • http://paulgraphics.paulsfashion.in/files/bijunuxebot.pdfIn PDF document text
    • http://ckudzcssffhhj.handysociality.com/upload/files/semilugivokegedipofexizet.pdfIn PDF document text
    • https://balarampurblock.in/ckfinder/userfiles/files/kotugivododegimabawolifa.pdfIn PDF document text
    • http://vnos.vn/app/webroot/uploads/files/vulumizanema.pdfIn PDF document text
    • https://www.highettmetal.com.au/application/third_party/ckfinder/userfiles/files/gororozimel.pdfIn PDF document text
    • http://murzilka.biz/images/uploads/file/89651950236.pdfIn PDF document text
    • http://back2wood.de/userfiles/file/lazuwodutaburujexejutu.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/nawozasidokujadota.pdfIn PDF document text
    • http://wamer.org/userfiles/file/mokijanaras.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/hcklhaofaruvig4aeittak3ep1/xekixezemigala.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/tilisonoduwadu.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/lixifurowoteba.pdfIn PDF document text
    • http://tangneylaw.com/admin/images/file/sojujadetosigigiw.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/bdc10126c2711d857ea9fb29b9b671b6/kofuzoluxomugasu.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/gataxunililobudagabaso.pdfIn PDF document text
    • https://ip-kamera-rendszer.nuttydog.hu/ckfinder/userfiles/files/88430637256.pdfIn PDF document text
    • http://businessnavigator.in/ckeditor/uploads/files/sevukoviw.pdfIn PDF document text
    • http://loca-granderoue-montaletang.com/ckfinder/userfiles/files/muraguvefafepokip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=videobuddy+2020+appPDF 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_off0000e20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20A 17344 bytes
SHA-256: 16ccffd8e4d67e7a3026f159a5d4185b637b0e94f880f5a3875f33c32d3d305d
font_01_sfnt_off00010f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12737 10436 bytes
SHA-256: b59af1ac3199ef77debf6930c1523115c8dd9c2005c2a20022ee65f9f62de151

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