Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4692e13af4efe39…

MALICIOUS

PDF

79.7 KB Created: 2021-09-23 07:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c6f2c6aea8f80ebbef243c245bc14800 SHA-1: 597e30af37c5e8e1d7e67b328c18ba57151f4289 SHA-256: e4692e13af4efe39bdb8a35232847ef91c34e02aa376cb4e5f4376cc248b1528
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features a large number of external URIs, many pointing to potentially disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://www.pavimentosyreformasferlu.es/ckfinder/userfiles/files/64219533927.pdf In PDF document text
    • http://anaminfo.com/attachfile/file/kezumijo.pdfIn PDF document text
    • http://portalinmobiliario24.com/uploades/fckeditorfile/veturigitu.pdfIn PDF document text
    • https://shreegroupco.com/userfiles/file/49114940178.pdfIn PDF document text
    • http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/rakutilibeke.pdfIn PDF document text
    • https://keiba-like.biz/js/ckfinder/userfiles/files/timixorudid.pdfIn PDF document text
    • http://vitrine-prof.com/files/66422290183.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/46901485806.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/23125625688.pdfIn PDF document text
    • https://efnnma.org/files/file/kerolipas.pdfIn PDF document text
    • https://haisanquangninh.org/data/dulieu/files/winifakapujudetugofufidov.pdfIn PDF document text
    • http://freewest.at/61825076891.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/100815ac27c4ee845a84684242317d6a/73782243343.pdfIn PDF document text
    • https://orderpoet.com/ckfinder/userfiles/files/dadejad.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/lidiwinubarulolodebi.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/belafe.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/zixepezoz.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a5057059d---23778254136.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/37768516487.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/zunokudu.pdfIn PDF document text
    • http://stonebreaker.at/sozedutudeke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=bastion7+weather+live+wallpapersPDF 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_off0000d051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD051 18488 bytes
SHA-256: 8217eed62605cab4543fbde296f5f12d1bdbfbefd999383b0295e0709fb03f9b
font_01_sfnt_off00010127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10127 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001193e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1193E 10604 bytes
SHA-256: 57087fa132249037b17dd27c4a6c985d626f29cf645b43ab701e4d7e8acd59c6

Open this report in the interactive analyzer, or submit your own file for analysis.