Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d624e19fb3165ee…

MALICIOUS

PDF

84.6 KB Created: 2021-09-17 15:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8dbb459b1bbe63eebee82c116448af1b SHA-1: 66e306e0cef6a2b39b6ef59df0bc4dfd7295fe4f SHA-256: 8d624e19fb3165eeb53eea675a6643df5806de1c4b1374be77e72a04f7286c0a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to link farms or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c7b467b40---simiza.pdf In PDF document text
    • http://mydreamtuscanwedding.com/editor_up/46518379638.pdfIn PDF document text
    • https://htlexpress.com/ckfinder/userfiles/files/fepufunumaxomaposire.pdfIn PDF document text
    • http://azco.friend-match.com/upload/files/21701873742.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/161395675bcc21---92073476055.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/75497156051.pdfIn PDF document text
    • http://pkpneu.cz/userfiles/file/kewumemegadonemosi.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/46223022919.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/1268164379.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/59975870326.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/manevonawoziruxiwul.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/kajedidunovif.pdfIn PDF document text
    • https://inprovitperu.com/ckfinder/userfiles/files/zuximatevesixaba.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/94102252328.pdfIn PDF document text
    • https://flims.atelierleuthold.ch/userfiles/files/26553669434.pdfIn PDF document text
    • http://volvo-cars.jp/js/upload/files/73014236737.pdfIn PDF document text
    • http://emachn.com/data/attachment/file/31750497926.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/80775493924.pdfIn PDF document text
    • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/5340406618.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/52123483576.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/26066249030.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/b3ab4f8c80e68f522347fc386d1e20f5/xudajinunibugawokaxo.pdfIn PDF document text
    • http://henanshuangxin.com/d/files/46258098154.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/dulezolagutak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=hack+game+extreme+car+drivingPDF 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_off0000e450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE450 10632 bytes
SHA-256: f676255a56e72734fff3e2d93e7f58a71f0d90a1b1ef295f87c797b0fc36320f
font_01_sfnt_off0000fc6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6E 18308 bytes
SHA-256: 57fbcf602dbba3e6beabc392a884c47a81c9e0985f30534f6e720a1f62f94ed4
font_02_sfnt_off00012b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1