Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ad120dec24e243…

MALICIOUS

PDF

73.9 KB Created: 2021-09-26 06:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 705ecabfd2c25aa0cedec48965cd5aaa SHA-1: 134874b5097b0e3d478ac651cad3bd14a355d8b0 SHA-256: d3ad120dec24e243bc6dfe07a07c8a64ddddf2708bd9ef83c4dd5ba30d5be530
134 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of embedded JavaScript and a large number of external URIs, many pointing to disposable hosting, strongly suggests a phishing or malware distribution attempt. The ML classifier also returned a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • 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 https://queure.ru/uplcv?utm_term=google+chrome+video+player+android PDF link annotation
    • https://leonardscopysystems.com/home/leonards/public_html/ckfinder/userfiles/files/timijod.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/26921728569.pdfIn PDF document text
    • https://amt-alarmy.pl/userfiles/file/65391930879.pdfIn PDF document text
    • https://wecareprogram.org/images/file/pejukidip.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/11208451499.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/14381196048.pdfIn PDF document text
    • http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210906205402.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/50528657519.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136571e135c4---89340649767.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/8f4f1effb7807b46ad5721e86d8391c6/fasojov.pdfIn PDF document text
    • https://tckontrola.zagi.hr/files/filirajiluvop.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/woxesapudizomazadije.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/57056659275.pdfIn PDF document text
    • http://www.ghidmariaj.ro/app/webroot/files/ckfinder/userfiles/files/30576046826.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210918045148_j3np5u.pdfIn PDF document text
    • http://video-cycling.de/files/file/pikeponozosesudo.pdfIn PDF document text
    • https://cfaegaianascente.pt/portal/userfiles/files/45912081444.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/vajopabanetafope.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/73453669331.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/25997765765.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/zizavuwijabovemimimigutiv.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/zagonodiximab.pdfIn PDF document text
    • https://kvizek.hu/ckfinder/userfiles/files/9929562200.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_off0000b567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB567 10916 bytes
SHA-256: 513b22c68d69286167288ffdd818ba3d4d2cd91a219c0ee5c7f0405684971213
font_01_sfnt_off0000ce48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE48 19180 bytes
SHA-256: dfb3b119e6d324f036b71fcda0a92774b13772dcc004ebedc20e6c22d17563db
font_02_sfnt_off0000ffb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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