Malicious PDF — malware analysis report

Static analysis result for SHA-256 2adc4fc753c1906d…

MALICIOUS

PDF

74.4 KB Created: 2021-09-21 07:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: cdd76974653f0f7c37d4e8c753aada12 SHA-1: 0c7c6a317d5f00601e1aa38ffe68b0e84d9d9816 SHA-256: 2adc4fc753c1906de24c56dd1934141c2a23acba119b43e38001c5d59a4a6ee6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The presence of ClamAV detection and ML classification as malicious further supports this. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to host malicious content or phishing pages.

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://nomylo.ru/uplcv?utm_term=notification+reader+android PDF link annotation
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/mqjsn618q2467du02mln5cb9pf/96316538772.pdfIn PDF document text
    • http://architettogherardi.eu/userfiles/files/gugenafuxanos.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/vabajezefanaxovoparudoput.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142c530a00d1---bagorewalomu.pdfIn PDF document text
    • http://daivupaint.com/img-chamthi/files/juzutijukupesoxagi.pdfIn PDF document text
    • https://asesoriagade.com/app/webroot/files/files/18179127953.pdfIn PDF document text
    • http://wildzipper.com/clients/wildzipper/userfiles/file/dumokufokugi.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/34908149748.pdfIn PDF document text
    • https://seedomoretravel.com/files/files/lunesusozofiwajuperux.pdfIn PDF document text
    • http://henghuitong.com/jingkelun/userfiles/files/20210911022018.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/gapizilusisuwifidokuwojo.pdfIn PDF document text
    • http://potentialdesign.cn/userfiles/file/1631961945.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/198ddc3cbb45af0c4e5eeb7bc95596ba/kixelubaxiz.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613457e5ecb67---84051346049.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021091304555865.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/99243871274.pdfIn PDF document text
    • http://hwayoung.kr/upfile/files/tewikawukoturasutozutawid.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fotegisadudizigasigo.pdfIn PDF document text
    • https://pincodehub.in/userfiles/file/wezabumekudut.pdfIn PDF document text
    • http://archiprojektai.lt/app/webroot/uploads/userfiles/files/lubivufo.pdfIn PDF document text
    • http://vibestedu.com/_UploadFile/Images/file/dovugomivugusokunomo.pdfIn PDF document text
    • https://insp.biz/img/file/56188284794.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/tamapatenepe.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/64512029827.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/wojojikifojoviba.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_off0000c0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A4 10232 bytes
SHA-256: 7bcb768a126d5e27b69a1330e066990097b820dd008e44ee0608accde43f17fb
font_01_sfnt_off0000d7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000efcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCD 17280 bytes
SHA-256: 25b9fb64b201826276db106d036a3f74e834874fa40a4e822216092d21ef3d42

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