Malicious PDF — malware analysis report

Static analysis result for SHA-256 6630155522d4c1d3…

MALICIOUS

PDF

69.9 KB Created: 2021-09-14 00:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ed65d4e840b6e92b0b034dff45858f8a SHA-1: 489f4be5a7cdcf38293af1f3b1588fde16eee037 SHA-256: 6630155522d4c1d386b1b8e6900826fccd0a71667bf308f81237a5eaa28e167d
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs pointing to disposable hosting, combined with the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic, suggests a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which could be used to facilitate the download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • 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.
  • 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://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb1c489d6a---bitepuw.pdf In PDF document text
    • http://safedoorsystems.com/cmsimages/file/tozosazogodirox.pdfIn PDF document text
    • http://agama-rc.com/upload/files/bivodesoboruvivozokaw.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/wabopuzolotokulitatofuwaf.pdfIn PDF document text
    • https://tarsiman.ee/files/file/57584804582.pdfIn PDF document text
    • https://kingdom.vn/userfiles/file/13727188205.pdfIn PDF document text
    • http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles/files/vusokugawivasetese.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/88976131271.pdfIn PDF document text
    • http://iproperty.ae/userfiles/file/20700232749.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/70430414089.pdfIn PDF document text
    • http://klick-tipp.at/ckfinder/userfiles/publics/files/30577964796.pdfIn PDF document text
    • https://specializedfacilitymgt.com/public_html/userfiles/file/gejubev.pdfIn PDF document text
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/zetejatukorefiguvugolina.pdfIn PDF document text
    • http://iberryhomemade.com/userfiles/files/gopinaxov.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/kisukadufufutopozaworawij.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/80781861313.pdfIn PDF document text
    • https://red-adlay.com/upload/files/mobadugugunijedoliregud.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/63287597760.pdfIn PDF document text
    • http://pekbdt.com/filespath/files/20210902030307.pdfIn PDF document text
    • http://mayjack.com/upload/files/kopenozobedaz.pdfIn PDF document text
    • https://iwistw.com/upload/files/67732373015.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/teravemapidotebu.pdfIn PDF document text
    • https://ducthai.vn/userfiles/file/wugugopimiwesizeto.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/dowuwozideg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=mp4moviez+download+hollywoodPDF 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_off0000b291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB291 10688 bytes
SHA-256: 6d28c963cbf394fa9f08c724bb709ce5a43be381fb7dbc6f3f6c67c1db3bde3a
font_01_sfnt_off0000cafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30C 15568 bytes
SHA-256: 552b3df9710ad1b53dfc0aae73c733190ba86823f3da0960aeb98fc68e3ca3a6

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