Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b227752ee7e8969…

MALICIOUS

PDF

79.5 KB Created: 2021-09-29 06:14:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 11c315437fcb6afe4bf48dedeee384bd SHA-1: 5f532185c8ab782d93645d299bf874428a5cb1f8 SHA-256: 0b227752ee7e8969f6729f65743ccd9a25f27b99a1642ce06e4650ccdf555816
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the nature of the heuristics indicate it's likely used as a delivery mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://garglob.ru/uplcv?utm_term=suguha+and+asuna PDF link annotation
    • http://studiosantese.eu/userfiles/files/jotakojutigududajiduzul.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/14761285647.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/xowujikot.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33298067873.pdfIn PDF document text
    • http://cnsgafgl.netsociality.com/upload/files/9752423005.pdfIn PDF document text
    • http://spprp.pl/userfiles/file/wedeponolokuribogafujat.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/3934591293.pdfIn PDF document text
    • http://www.pilartangguh.com/file/gimeraxegojukamo.pdfIn PDF document text
    • http://privateeducation.sg/verzsape/demo/upload/admin/files/72792221022.pdfIn PDF document text
    • https://promise-land.com/upload/file/14387888318.pdfIn PDF document text
    • http://engcaphone.com/_UploadFile/Images/file/17551346280.pdfIn PDF document text
    • http://thelifelesson.net/home/tappingchanges/public_html/dowalumniusa/ckfinder/userfiles/files/nuwarelovuvidu.pdfIn PDF document text
    • http://hawaiianhunareiki.it/file/nefedasade.pdfIn PDF document text
    • https://latrinquette.com/upload/editor/file/piripumatemeniw.pdfIn PDF document text
    • http://ensky-chemical.com/upload/files/65189752769.pdfIn PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/89278196860.pdfIn PDF document text
    • https://thaibamboorestaurant.ca/phpsites/bard_ford/uploads/file/nodixetojowiluxabune.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/vetefonimibel.pdfIn PDF document text
    • http://huynhgiabaohotel.com/uploads/FCK/file/zegavobubijagezemuwi.pdfIn PDF document text
    • http://mebel-moscow.com/content/xuploadimages/file/zixiduguvalede.pdfIn PDF document text
    • http://srtcivilnorth.com/ckeditor_file/files/parujuguzedipasusen.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/32347700364.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/wafuzenopodutijoxirusada.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/95667896942.pdfIn PDF document text
    • http://it-hair.com/userfiles/dikokozuvuwenemoxejumok.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_off0000c712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC712 21768 bytes
SHA-256: e552b757f2cf5a4ccc3b2f8d5744cf927f6af00e86c4f65be3725de70424360c
font_01_sfnt_off00010051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10051 10116 bytes
SHA-256: 3d03340fe5578bd90a7c45e237dff5c09a86545b4705c248e0059c17487c48d6
font_02_sfnt_off0001168a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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