Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7f8a02917349ed3…

MALICIOUS

PDF

79.8 KB Created: 2021-09-13 02:26:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e891f244d2acd47da462111a9b70d87f SHA-1: c3e69d6ebaf5252538927473c17e1dd8dcd9edd5 SHA-256: e7f8a02917349ed3fea5750f0e9cd3f1a903def5f7cc7ccbdc1ad4e45017b74a
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to disposable domains or potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JS suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://pixomot.ru/uplcv?utm_term=aiming+expert+for+8+ball+pool+premium+mod+apk PDF link annotation
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/42988986269.pdfIn PDF document text
    • http://myatkinsonfamily.com/userimages/megesiwukimuveko.pdfIn PDF document text
    • https://abss.pt/userfiles/file/mupakep.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/81617525958.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/4s1p9g4sotku7gr7s4hhrckrf6/rotoderubedix.pdfIn PDF document text
    • http://termocity.by/pics/files/50250194001.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210902_56E666A36AC15542.pdfIn PDF document text
    • http://sweethomedelivery.com/ckeditor/ckfinder/core/connector/php/uploads/files/78528232036.pdfIn PDF document text
    • https://heyratacademy.ir/file/rolozidi.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e83e272bfa---1573015940.pdfIn PDF document text
    • http://incomsistema.ru/ckfinder/userfiles/files/volofaraseju.pdfIn PDF document text
    • http://hosteleriayvending.com/ckfinder/userfiles/files/12813429013.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/molad.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/penawilamisunojoz.pdfIn PDF document text
    • https://stthomasorthodoxchurchsouthpampady.com/userfiles/file/70296191968.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/total.pdfIn PDF document text
    • http://xhiehchin.com/Xhieh_News/_file/jekatefetibitobidutiga.pdfIn PDF document text
    • http://111-orte.com/testarea/cwsCMSlight/media/files/wuparorunaluwexabemefejir.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/kumuluwobelifotup.pdfIn PDF document text
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40560895775.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/55133248631.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/19641857863.pdfIn PDF document text
    • http://kolbiko.com/images/uploads/file/68756961702.pdfIn PDF document text
    • http://opsir.eu/files/file/mavesudemomojedanibadi.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/rogesikapemelata.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_off0000d317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD317 11296 bytes
SHA-256: 7955a694aa3246f7a4b102f6292605c1bd8aafb288f0b5b2f86c9399826bf062
font_01_sfnt_off0000ed2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2E 17012 bytes
SHA-256: eb60e058d06276be23ab6ed9bd286a3a1610584e893a43ede053124aa0489be0
font_02_sfnt_off0001196c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1