Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bce295c93a0f07d…

MALICIOUS

PDF

84.5 KB Created: 2021-09-08 23:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6fd4766a6033cf160772e58736647750 SHA-1: 97516919a72f7f2ac46bdf5f077002b9089f4a82 SHA-256: 6bce295c93a0f07dbdf19cb96dc4665d487603a1114480ae9bbf3239039158a1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple external links, with one pointing to a raw IP address, indicating a potential distribution point for malicious content. The presence of a 'download button' heuristic and a high ML classifier score further suggests malicious intent. While no scripts were explicitly extracted, the PDF structure and linked URLs are indicative of a phishing or malware delivery attempt, likely using embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://martonaroniskola.net/userfiles/file/zawelesa.pdf In PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/sojot.pdfIn PDF document text
    • http://risme.vn/files/59529542812.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132449be8f52---86790083320.pdfPDF link annotation
    • https://cosplay-expo.it/ckfinder/userfiles/files/nafar.pdfIn PDF document text
    • https://hoatuoi360.vn/uploads/files/nibikutasiledupux.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/pikesarom.pdfIn PDF document text
    • http://gardens-spa.com/user_pict/file/xokefowejuwugeru.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/22ttmabfhiki6g2e1v5tu18alh/87092057714.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/surazisidux.pdfIn PDF document text
    • http://hyundai-dongdo.vn/images/files/nefes.pdfIn PDF document text
    • https://www.savininkai.lt/ckfinder/userfiles/files/11132278938.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/96077386134.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/finas.pdfIn PDF document text
    • http://solarexperte.ch/fckeditor/editor/images/file/29690442792.pdfIn PDF document text
    • http://proxima-design.cz/files/file/peruna.pdfIn PDF document text
    • http://milliondollardesiclub.com/upload_files/featured/files/pugivusowetafabijom.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/d76d9a58ae6a89900f521e95dc8f3f7c/vumemoxizavezorutilure.pdfIn PDF document text
    • http://kmsenior.org/file/files/45994765231.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/vomakuwuwogorikivu.pdfIn PDF document text
    • https://www.wappa.com.au/siteadmin/ckfinder/userfiles/files/jikojijuzizapagakanalu.pdfIn PDF document text
    • http://ipcmanpower.com/admin/style/images/userfiles/file/65818089851.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/wedekokowikes.pdfIn PDF document text
    • https://www.uflo.edu.ar/ckfinder/archivos/documentos/47213166615.pdfIn PDF document text
    • https://euroialinsol.ro/userfiles/file/gefaseja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=dragon+city+hack+tool+androidPDF 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_off0000e521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE521 18232 bytes
SHA-256: c1b9738f8d3a382e5c7187703bfe22038ac5a0ccd0b667fa1a5a0a7b8d90db05
font_01_sfnt_off0001148b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1148B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA2 10556 bytes
SHA-256: cab6fc85f8d6f038be8c5143882b641c8a96d8df6ac188379b72bf8c43c793e8

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