Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6b358a2423f943…

MALICIOUS

PDF

79.0 KB Created: 2021-09-17 20:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a27f7e204f848e0f23759d16f6ba1bd8 SHA-1: 079c1dee41548c8fe0b2c0c698773fe6d25c64e1 SHA-256: ce6b358a2423f943cd1f9d71ecdef98351ae40e5072218c32b20c51c51c5de87
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The PDF contains numerous embedded URLs, many of which are part of a link farm designed to redirect users to various PDF files, suggesting a phishing or malware distribution attempt. The presence of external URIs and the 'link farm' heuristic strongly suggest an attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://dakotaterritorydevelopment.com/ckfinder/userfiles/files/babalalodeji.pdf In PDF document text
    • http://homeopathyhongkong.org/files/50000238140.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16134e0a77eb29---suwedim.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/86161325959.pdfIn PDF document text
    • https://megatex.ua/images/uploads/file/xuwemumeruzoroten.pdfIn PDF document text
    • https://nbc.com.vn/ckfinder/userfiles/files/53752826454.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/65023159933.pdfIn PDF document text
    • https://tessuno.com/upload/files/6130ebe1e3ef4.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/20219111650492398.pdfIn PDF document text
    • https://foundlight.ca/home/foun6192/public_html/files/custom_files/file/xinoti.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/puxawi.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/wezolasejufini.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/66553325203.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/42827613815.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1631544541.pdfIn PDF document text
    • http://kastely-vacduka.hu/fileok/file/88530891212.pdfIn PDF document text
    • https://funbugs.ie/files/file/texekotixal.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/torakawojexedajufefe.pdfIn PDF document text
    • https://taiwancy.com/app/webroot/userfiles/files/barabowupumidepubabowuv.pdfIn PDF document text
    • https://chulintemple.house-well.com/CKEdit/upload/files/teduruli.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/kuzuzidaku.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/jetudomixifoduvixipi.pdfIn PDF document text
    • http://juentai.com/userfiles/files/doxelosuxitek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=download+gta+liberty+city+stories+obbPDF 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_off0000cd3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3F 18692 bytes
SHA-256: c1c012b66d7be090e21710f32c36e2b582de404697aefa425be4d54ce937eeff
font_01_sfnt_off0000fd5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5B 10888 bytes
SHA-256: 2424647053221accac65e08fb03d7d3835503cbea6d5452787c9a95ded9dba3b
font_02_sfnt_off0001168a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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