Malicious PDF — malware analysis report

Static analysis result for SHA-256 06fde8c4fdbecd7c…

MALICIOUS

PDF

84.5 KB Created: 2021-09-13 01:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 662de4e2037c75869c4646446806c137 SHA-1: 5dc62b2aceed62139f0dd0d36c6bda91560a03ed SHA-256: 06fde8c4fdbecd7c7580ff9345b5d4d76467ad610d82b60f95d8403cb858f83f
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by an ML classifier as malicious and contains numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, likely to redirect users to download unwanted or malicious software. No scripts were extracted from this sample, but the structure and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 4

  • 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://wastran.ru/uplcv?utm_term=mirror+app+android+to+pc PDF link annotation
    • https://szekszardportal.hu/userfiles/file/18471741664.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/wovanixipunulin.pdfIn PDF document text
    • http://silver1979.com/upload/file/mofisowupubalizavoluvop.pdfIn PDF document text
    • http://balaton.varosom.hu/userfiles/files/76517153123.pdfIn PDF document text
    • http://ocvitlucky.com/vietkiendo/upload/file/23316068187.pdfIn PDF document text
    • https://ekoelprom.pl/public/images/editor/file/61070894660.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/kifisejiguvopalopiboleko.pdfIn PDF document text
    • http://accapierre.it/userfiles/files/sujorivizojekuwa.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/vaxinuwaxexufa.pdfIn PDF document text
    • https://arerp.kr/data/file///bijusozowo.pdfIn PDF document text
    • https://www.ijdsir.com/ckfinder/userfiles/files/20211821577.pdfIn PDF document text
    • http://elitacasa.it/images/file/virug.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f41ce04966---gajemizakuvi.pdfIn PDF document text
    • http://sov.tranovice.org/webpagebuilder/ckfinder/userfiles/files/kefexogumegenovevuke.pdfIn PDF document text
    • http://filippodelvita.com/demo/userfiles/file/xafitufot.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/nowitozuxobusimanalabu.pdfIn PDF document text
    • https://altaamir.ipixpms.com/Rapport/public/assets/ckfinder/userfiles/files/vilijapalaxomub.pdfIn PDF document text
    • https://gcr.goldcrownresort.com/magazine_files/files/36761005554.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613da9390c8de---41612195709.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/watubiludone.pdfIn PDF document text
    • http://grabnerestriche.at/nanepaxuvotuw.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/27735129849.pdfIn PDF document text
    • http://mijinmotor.com/fckeditor/userfiles/file/37611193932.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_off0000e8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E4 17276 bytes
SHA-256: b6f085a1c96950eed00a18d420f0921f46e09d6a1ded9b54164f495ef5e2b505
font_01_sfnt_off000115b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCE 10156 bytes
SHA-256: 76400594062b79fbecaacd6b659e81d67c3f589fc7b46154ba77ae84c9e8ad06

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