Malicious PDF — malware analysis report

Static analysis result for SHA-256 47fcf41742800711…

MALICIOUS

PDF

84.4 KB Created: 2021-09-23 23:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 234d3ea6549275dce68339329cccf7dc SHA-1: 1b7d207a85d9614e289cdb24440e21bb59a75d4f SHA-256: 47fcf417428007119c1b3af714b03d5719e748748403bd78358d95badd7e916a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 5

  • 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.
  • 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://laborke.ru/uplcv?utm_term=measurable+organizational+value+example PDF link annotation
    • http://kantipursecurity.com/userfiles/file/91789953173.pdfIn PDF document text
    • https://protraderin.com/userfiles/file/xanazanabawozovo.pdfIn PDF document text
    • http://czminghe.com/upload/files/tulosavukuvotugekebifoji.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/16080639327.pdfIn PDF document text
    • https://tranhtreo.com/images/ckeditor/files/6801944932.pdfIn PDF document text
    • http://chinalabware.ru/d/files/94656227014.pdfIn PDF document text
    • http://geonatlife.es/ckfinder/userfiles/files/redazusixugagewawawop.pdfIn PDF document text
    • http://damutech.kz/upload/2021/09files/210915201114243840jtr2d.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/sivemobovuxisujisufijemar.pdfIn PDF document text
    • https://femagnet.com/upload/edu/article/file/xisix.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c66c4a013f---rorivifoma.pdfIn PDF document text
    • https://sydneystudytour.com/accounting/userfiles/file/samaputupu.pdfIn PDF document text
    • http://bigbulkbags.ahmadpackages.com/survey/userfiles/files/73211332001.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/66798052025.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/19422152911.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/k916s8n4guhu215ka6nndn6g4e/62271243065.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/salapalixatub.pdfIn PDF document text
    • https://www.hermanosvalerorecio.com/ckfinder/userfiles/files/jefibizaxosubajonivux.pdfIn PDF document text
    • http://sbriz.ru/userfiles/file/86563935802.pdfIn PDF document text
    • https://truckforceone.com/upload/editor/file/98280371156.pdfIn PDF document text
    • http://caigeshi.com/uploadfile/file/2021090304340473499.pdfIn PDF document text
    • https://quizai.com/uploads/files/15062905802.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/63359297728.pdfIn PDF document text
    • http://nktrading.qa/file/files/wovavubevori.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/dusuduxemof.pdfIn PDF document text
    • http://indianspringhomes.com/userfiles/files/2848169750.pdfIn PDF document text
    • http://ciskmv.com/css/file/67152889171.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_off0000e1fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FE 18120 bytes
SHA-256: d3c2d64e93007bb6ef520ab70cecbdfe9a958880d95552bb9b88a73339859754
font_01_sfnt_off00011181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11181 11056 bytes
SHA-256: 2d3e51ace9c7537b086d95fa3111748adbf93ed804ee6c50c1da257bbe9875dc
font_02_sfnt_off00012b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1