Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2207c34efcfcdf9…

MALICIOUS

PDF

97.1 KB Created: 2021-07-30 20:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 72376a239c6e95d55563745a8b067cf7 SHA-1: b6a7710428f20262e740c405ff8578657f482f42 SHA-256: c2207c34efcfcdf97cf9618890ea86f9d6a2851fe305ca3468d9f974c3da289c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress sites hosting PDF files. These links are likely intended to redirect users to malicious content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd018730909---38086865772.pdf In PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/2i2mt1c2g6cnsffpnvifsr7b1j/zalebibubije.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aff6e31afb---pejoliwogawuwir.pdfIn PDF document text
    • http://goldenteriyaki.com/uploads/files/bimajuneretubokutiredufe.pdfIn PDF document text
    • http://3lbordercollies.com/clients/a/a5/a537dd6ebb785c9f51a9b4acbfea693c/File/36171446435.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/31011092984.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811126d1aa5---nefix.pdfIn PDF document text
    • https://eyescare.vn/app/webroot/upload/ckfinder/files/kowenevidune.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/jepomomifagumoxud.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb249ada48---tosuxapaw.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/17343770533.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/32424469722.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/31526723003.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/7aa3c36b8cd08af3ffdff57926bc7baa/joximesabarefexo.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/28471172424.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8b0b43147---lifivivoso.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/navif.pdfIn PDF document text
    • https://vestol.bg/files/file/natimotekojunukabut.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/davapawotojubonugavi.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/10mlccgh13ae75kd6cghcuddvm/28746419675.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/37930251909.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/fawovifapul.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/pegaxapufi.pdfIn PDF document text
    • http://renknh.com/ckupload/files/50158481808.pdfIn PDF document text
    • http://ablerexthailand.com/userfiles/files/dizamumuzaripefike.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=exerc%C3%ADcios+sobre+frase+ora%C3%A7%C3%A3o+e+per%C3%ADodo+8o+ano+com+gabaritoPDF 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_off00010d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001253a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253A 20280 bytes
SHA-256: 0f98d457e4f4edac70bd47b56cbaa22894e3acf15e072e5c8802a39717d9f3ae
font_02_sfnt_off00015717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15717 11876 bytes
SHA-256: cdf5a81c7e76d7c050ec5c67b80f89c749b2a71b902506eaf90a750bd4dd121e