Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1702f51f08f155…

MALICIOUS

PDF

84.7 KB Created: 2021-10-07 17:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ffafbbe73d7397403f905454814744f1 SHA-1: 150ddf1af9a7d456235f2e9a82119d8b75c75d2a SHA-256: 2c1702f51f08f1553e396b5bb7719f4b69c477b582102c735ee110f7959792a5
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, suggesting a link farm designed to host malicious content or phishing pages. The 'SE_URGENCY_LURE' heuristic indicates the document likely uses deceptive language to prompt user interaction. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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://cableesmaltado.com/d/files/97626052802.pdf In PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/busagunimuruso.pdfIn PDF document text
    • http://www.ap-arte.ro/fckupload/file/2329124223.pdfIn PDF document text
    • http://irfanmakina.com/depo/sayfaresim/file/jolelawuluji.pdfIn PDF document text
    • http://519pf.com/userfiles/files/dafimumulune.pdfIn PDF document text
    • http://groupkaishan.com/d/files/57241169602.pdfIn PDF document text
    • http://karaokejdi.com/ckfinder/core/connector/php/upload/files/gelalanenufozil.pdfIn PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/lusupusijuwekug.pdfIn PDF document text
    • http://factblogs.com/uploaded_files/userfiles/files/34587688164.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/30479807002.pdfIn PDF document text
    • https://odontologosmalca.com/images/userfiles/file/wufazidil.pdfIn PDF document text
    • https://miminku3.com/contents/files/talilugivoparexigesewa.pdfIn PDF document text
    • http://canavesiobruno-architetti.it/userfiles/files/suzijatelopowekitis.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/7a7f830c0746d43ff44e222f4d4c9432/8656720489.pdfIn PDF document text
    • http://intproplaw.com/admin/uploads/file/popobekixadowan.pdfIn PDF document text
    • http://tongshengchem.com/ckfinder/userfiles/files/tonufoxamedag.pdfIn PDF document text
    • https://metrosecuritynepal.com/assets/userfiles/files/dozojepuborefev.pdfIn PDF document text
    • http://abwferrellpkwy.com/uploads/files/gunolivunalukuzipotorug.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/pigiruboxomagimow.pdfIn PDF document text
    • http://kondicionery-noginsk.ru/upload_picture/file/92396116229.pdfIn PDF document text
    • http://novafish.it/userfiles/files/jukaraz.pdfIn PDF document text
    • http://onmamtour.com/FileData/ckfinder/files/20210929_0AD0DB39104AAF84.pdfIn PDF document text
    • http://nilesk.com/userfiles/file/36847902688.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/kuvegetemepudigurapi.pdfIn PDF document text
    • http://ryukatsu.com/userData/board/file/xisubanamegekojefutop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=hci+questions+and+answers+pdfPDF 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_off0000e4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBB 18184 bytes
SHA-256: 89af0a0614ad581c066fb3e613aba67236138ca625278416e72544942cb2fd0f
font_02_sfnt_off00012c24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C24 10892 bytes
SHA-256: 99748ef401ac1511ffd82b5d01a27c61f79c765797c3f13a1191d78333d4f272