Malicious PDF — malware analysis report

Static analysis result for SHA-256 48913027509bbdfc…

MALICIOUS

PDF

87.1 KB Created: 2021-09-16 06:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3f0199ea7e357713de5a44c01dba9457 SHA-1: 12b6ba6f1c9c3e4f725f836e3db2b9cbd5387d37 SHA-256: 48913027509bbdfc983dbc0b9b613aad9887cb249bab79cc99b14702571c39b2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute further malicious content. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which is often used to facilitate malicious downloads or redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://belniig.by/public/file/41734500354.pdf In PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/76379052339.pdfIn PDF document text
    • https://groupunsur2.com/contents/files/medufefegi.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/60688234723.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/mefurowate.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/fobigijakakepipatekuni.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/ribedeguzolisatafes.pdfIn PDF document text
    • http://partnercable.com/files/telegixutetowidaw.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16130ae90763d6---91215181419.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613c98ede36b7---ziveb.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/oo2np3mkf51mstu7shmtr1ubsd/41182979280.pdfIn PDF document text
    • https://alkoplast.rs/files/josomipidipazogisuvo.pdfIn PDF document text
    • http://mrcubezpieczenia.pl/app/webroot/media/files/givozobobeguwajiposu.pdfIn PDF document text
    • https://lordoptika.hu/files/files/vubojosawogifutizopumup.pdfIn PDF document text
    • http://nilesk.com/userfiles/file/fusige.pdfIn PDF document text
    • http://gpp300.fr/userfiles/file/58335839615.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/pljg1toj9evinvfaqocgodfrov/lixirebesemizok.pdfIn PDF document text
    • http://studiodugnani.it/userfiles/files/44743787801.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/24268564887.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/3727784702.pdfIn PDF document text
    • http://atek-ent.com/upload/file/84019341432.pdfIn PDF document text
    • https://stomatoloska-ordinacija-rijeka.com/files/dukesuvimidodabuwo.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613908b6e6e0c---badebufulu.pdfIn PDF document text
    • http://sprinter-lab.ru/content/File/febowovibefosulef.pdfIn PDF document text
    • http://citysoupsbellevue.com/uploads/files/fukanowono.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/23725417020.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=ping+iptv+renewalPDF 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_off0000ee2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2E 18568 bytes
SHA-256: 8d2e2d0036bb320700b5d31f1d17dc426c7ab68c5483c4de6aed7af5a285b90d
font_01_sfnt_off00011e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E73 10292 bytes
SHA-256: cc634739f75cc47ed6db2625e6b125caa2af2b1349cffa31dd3d7b5c54ba7e8e
font_02_sfnt_off000135c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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