Malicious PDF — malware analysis report

Static analysis result for SHA-256 084700e13627ea36…

MALICIOUS

PDF

94.1 KB Created: 2021-09-14 01:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 1f69dff15480049a05cae68a0c79cc22 SHA-1: 26121881d07df2584cbf71b61566c2b486eb286b SHA-256: 084700e13627ea3638e546459a736f2ef3c3e279f3fe60f70e8ce91381b72ddb
174 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and is flagged by multiple heuristics, including a ML classifier and ClamAV, as malicious. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to trick users into installing software, likely to facilitate further malicious activity. The embedded JavaScript may be responsible for executing the exploit or downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://szentdorottyapatika.hu/files/95113785497.pdf In PDF document text
    • http://snbedu.com/uploadfile/file///2021090520323645.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/tawerumajojum.pdfIn PDF document text
    • http://www.ernakulamarchdiocese.org/www/js/ckfinder/userfiles/files/77592997452.pdfIn PDF document text
    • http://prodottoitalia.eu/userfiles/files/gilanokamunabozupogulatek.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161366766c9e02---bubof.pdfIn PDF document text
    • https://sledovani2.gpshlidac.cz/www/userfiles/files/sapabavagirulolil.pdfIn PDF document text
    • http://cesvil.it/filesUploads/file/jupebidopazezurokifurimo.pdfIn PDF document text
    • https://alcoquimicos.com/ckfinder/userfiles/files/tubetofibulekis.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/fipem.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/vegerobexiwazijagezulekux.pdfIn PDF document text
    • http://ndt-ultratech.com/files/gutatazesoleviti.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/34523300598.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/lurunuxinim.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/mefoterixi.pdfIn PDF document text
    • http://gesundheit-im-blog.de/userfiles/file/48758047910.pdfIn PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/kudedafofafowilimobuxoni.pdfIn PDF document text
    • https://glaskunstcentrum.nl/images/file/fapiromemididugodoba.pdfIn PDF document text
    • http://blccy.com/userfiles/files/dudebelam.pdfIn PDF document text
    • http://baove24h.info/upload/files/20081825979.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-7/20210907100901211408.pdfIn PDF document text
    • https://mptradingcompany.com/userfiles/file/92504190948.pdfIn PDF document text
    • http://fxmeat.com/upload/file/95fcdab1290f4539c3146040acbbfff7.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=set+orientation+app+for+firestickPDF 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_off0000f6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CC 17704 bytes
SHA-256: a2c198873fedaf13b5c04753ae2a041767c681464274f7ebe0b8d8e5ce47ac83
font_01_sfnt_off000124e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E4 17648 bytes
SHA-256: 0815979efb0902f6001e38e8c55ff21efa2bf3dc4d9752ac3546b4bd89474615
font_02_sfnt_off00015300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15300 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1