Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd93eefa099095c1…

MALICIOUS

PDF

70.8 KB Created: 2021-09-20 16:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 831a9560f4f78123933576300ca2ff31 SHA-1: 165d4e51e42d92364a15ca22e37bfc3fa4a9372e SHA-256: fd93eefa099095c14bc7316363e09aaa123cf86a80df94e35ec753f43d5dd3ba
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://fence-alarm.com/userfiles/files/55712911948.pdf In PDF document text
    • http://hitecds.com/userfiles/file/70164119818.pdfIn PDF document text
    • https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/dizojetilozegabutu.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/vinemusilokavalokelabi.pdfIn PDF document text
    • https://hinaweb.com/upload/file/dojulefuvamo.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/91649690364.pdfIn PDF document text
    • https://olterus.net/contents/files/gutujuduziv.pdfIn PDF document text
    • http://roocenter.ru/upload/file/gukokidutaribokuboruwaji.pdfIn PDF document text
    • https://piti.leaddeehub.com/userfiles/files/pakexumewojeteraxasumuw.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/24e1fc25c65117d3fded3722f09de892/89647532083.pdfIn PDF document text
    • http://idolyokocho.com/js/ckfinder/userfiles/files/69898129685.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/jigotolubutivokujugiwuro.pdfIn PDF document text
    • http://dekogard.net/deko/veri/_files/89502599093.pdfIn PDF document text
    • https://hydratrend.com/application/third_party/ckfinder/userfiles/files/sokeruwitesex.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/soliwojun.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/roveb.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/44846469065.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/defamapojejagepube.pdfIn PDF document text
    • http://leeharringtonhomes.com/userfiles/file/xatoxelepetedadapokujo.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/temuxokukidekuvegik.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/87608109251.pdfIn PDF document text
    • http://fluitec.fr/ressource/site-image/files/bajabotimezages.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=prince+of+persia+android+games+free+downloadPDF 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_off0000b4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E1 10952 bytes
SHA-256: 3fd8baad0030f013a1fe9d0daa2eb3f4caa9e4e9647f896b2bfd8d9303a44c26
font_01_sfnt_off0000ce0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0A 15452 bytes
SHA-256: f12020bd5f44daf0376ceaacba55604fb8539aaa97792ae2fc2117c04af55cc0
font_02_sfnt_off0000f54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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