Malicious PDF — malware analysis report

Static analysis result for SHA-256 32bb54b4ef872f20…

MALICIOUS

PDF

74.1 KB Created: 2021-09-02 08:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c073ba95b188fc1d888d911ea8e3fb5e SHA-1: 63f53b71163991d917f48ed67c12df87e6b8e55a SHA-256: 32bb54b4ef872f2018833df63ab7fff54d0bd83dafbcc76a9eaae859c527bf32
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites, including WordPress uploads, suggesting a link farm designed to redirect users to malicious content. The file's structure and numerous external links indicate an attempt to exploit users by directing them to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://drafthe.ru/uplcv?utm_term=find+the+angle+between+the+vectors+calculator PDF link annotation
    • http://atsrealtyvietnam.com/upload/files/pegelemusalovisa.pdfIn PDF document text
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/rj6f9d4oeegdmlekgvqvghi0a5/49833275615.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b14c93e2827---vibukuges.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/64259859067.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609834714b407---nawavemebafowomizanitufil.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/214ea782ed10ec1e3937a48713d3f2b9/28546690056.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a2e521e7b---filagapojim.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/34687390207.pdfIn PDF document text
    • https://gomaihoa.net/upload/files/57198197108.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/6ecbuqgipnvc1qntnk97ktv8t4/10848067000.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/661a357744c147d90a5a9e6b3f7a0ca0/lizave.pdfIn PDF document text
    • https://duocvinhkim.com/userfiles/file/45631089015.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/masenasataxalo.pdfIn PDF document text
    • http://buyyoutubesubscribers.com/ci/userfiles/files/48755217582.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/jatabomuvivorebala.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/piwagufevukipoju.pdfIn PDF document text
    • http://teakdeck.pl/files/file/jezutuvowoxaxubugosijonig.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/50136587608.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/77299647671.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/tekewiwod.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/23895568512.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/faxukuvoxeminulebate.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a931a2d349---21161219740.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/b247b9726dc3416dbcf0f9d6a02810d0/tumunobipinijasalod.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_off0000bdeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDEB 17056 bytes
SHA-256: e136f6f7d98cf80139a58f702fd7eb7b3f2c8aedb7f684c845e259ccf26a0d6d
font_01_sfnt_off0000e9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A7 11020 bytes
SHA-256: 815901f839e6e82a9c6ef9b34fbe4fb149e0a25fb5ed06847a64aef4074028d6
font_02_sfnt_off00010304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10304 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1