Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cd3665f4c2aec14…

MALICIOUS

PDF

74.8 KB Created: 2021-09-25 14:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f102cbf891f6e24c10620ebe5955f973 SHA-1: affabdf18b3eb26062bfe0e68b6a4d364c370574 SHA-256: 9cd3665f4c2aec148f1ddb69939ee3f4693c10b7d9fd02fefe2bfb24607bd3f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs, many pointing to potentially compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the structure and URL patterns suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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://b2bircruise.travflex.com/bot/ckfinder/uf/files/62066204392.pdf In PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-9-1/20210901183245661353.pdfIn PDF document text
    • http://natalieshuff.com/uploads/file/tutigaduzosuduwa.pdfIn PDF document text
    • http://boek.se/bilder_umeny/File/82075988061.pdfIn PDF document text
    • http://kubablimel.pl/Image/files/kuxuwul.pdfIn PDF document text
    • http://ipublicity.cz/data/file/budivasaxadewibup.pdfIn PDF document text
    • https://hankilfood.com/userfiles/file/20210905023054.pdfIn PDF document text
    • https://nbretail.com.vn/ckfinder/userfiles/files/84640814688.pdfIn PDF document text
    • http://abwlondonblvd.com/uploads/files/90337314189.pdfIn PDF document text
    • http://we-women.de/default/files/uploads/file/nenarafokopuporezofudej.pdfIn PDF document text
    • http://whatcanidoforyou.eu/publish/file/givix.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/78611498598.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131d83ebe2f4---99221504656.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/4449785154.pdfIn PDF document text
    • http://sun-eko.eu/files/file/xujoputetekagini.pdfIn PDF document text
    • https://o2opr.co/userfiles/files/xogikizawajumuzekepi.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/guzopude.pdfIn PDF document text
    • https://budapestpainter.hu/ckfinder/userfiles/files/78567888087.pdfIn PDF document text
    • http://syekp.gr/sites/default/files/file/joronajibikusolikiwaz.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/17c0de90c6bf776526da3deba0690fb4/weraj.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/13859676183.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/rorom.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d24edb4efa---wotarafus.pdfIn PDF document text
    • https://icrs-as.com/userfiles/file/puvogowuzogobelutifumopop.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/vefosolifigoto.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/70010898527.pdfIn PDF document text
    • https://wintechindia.in/ckfinder/userfiles/files/53298799782.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=tubemate+apk+file+download+latest+versionPDF 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_off0000bc77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48E 11104 bytes
SHA-256: a8b189356604dede0370569163a64129e350692e20a98b6651aaa1a602a518eb
font_02_sfnt_off0000ee46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE46 18388 bytes
SHA-256: 4e70309c96b7e290eabb6451b140aaf690a9ccda2ce413057d42c3ebdae4a4c3

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