Malicious PDF — malware analysis report

Static analysis result for SHA-256 20072e7085a13294…

MALICIOUS

PDF

70.7 KB Created: 2021-09-27 00:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 1cf0e3b0afc7d49be5d9c431a79125e9 SHA-1: 6e5d94592204dc41ff0f2eec42aa5e3ac696137b SHA-256: 20072e7085a13294535ca666a3d34d64491f3b9c9f8e5315e21abe55c9e55a2f
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm or phishing lure. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the overall structure and heuristic firings strongly indicate a malicious intent to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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 http://toyotarent.hk/FileData/ckfinder/files/20210908_FF42C2C4B6F7FC51.pdf In PDF document text
    • http://123podkrovie.sk/editor_uploads/files/remudidegesuxa.pdfIn PDF document text
    • https://mgc.to/sites/web/upload/files/tezegafarov.pdfIn PDF document text
    • http://c-amc.com/upload/files/jiwuwegesuporaduti.pdfIn PDF document text
    • http://csc-020.com/userfiles/file/20210922151102_ya1c4g.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1bee992b3---10289284914.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/859e53bpid8kavukgjop9qctc6/defuvizuvazuvikiris.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16144719c8242e---45681747984.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/47423170413.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/jowiw.pdfIn PDF document text
    • http://www.cpnatacao.pt/backoffice/ckfinder/userfiles/files/linurawuka.pdfIn PDF document text
    • https://rintrans.com/files/xifogobifutujomakeduxaku.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/regidikupufugafepoxigawap.pdfIn PDF document text
    • http://tatishev.ru/admin/ckfinder/userfiles/files/sorufavotijiwasanifofuj.pdfIn PDF document text
    • https://consultemergingmarkets.cubsindia.com/files/35922621220.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/a20e359386d7f69be89ef6beddbb5c2e/38645237924.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/90408419807.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68420440263.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/6188580956.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614521919417c---tesumekiloze.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/rukikeli.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/63420127428.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/pidaxawimavuxufu.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/59cndc32n5b3rrf1v0d9cv8vvuno52a0/5479904872.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/togiwelikov.pdfIn PDF document text
    • https://coffeetuanvang.com/Images_upload/files/63848163207.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=tamilrockers+telugu+moviesPDF 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_off0000b5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5F7 10688 bytes
SHA-256: e6e08422cc07aca36aa1b7ab1ad9113974db4d94b8cf195e2327d9fc7b5cfbeb
font_01_sfnt_off0000ce8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8C 14996 bytes
SHA-256: 5b1cdb61fc71e217e29088f7e53739ed4969665943204276c68dd56dc46053aa
font_02_sfnt_off0000f4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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