Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e7eef537584662…

MALICIOUS

PDF

81.4 KB Created: 2021-09-05 02:22:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d0f9e9f7f7ad4c9d3df9011a9e8b7dff SHA-1: 8f7e07271d6fa179929e2be69d1eed965d47cf49 SHA-256: 26e7eef5375846629a9daba851144f953f92182bd91bb21052386e9c61755972
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1539 Steal or Forge Credentials

This PDF document is classified as malicious by ML models and ClamAV, and exhibits characteristics of a credential harvesting lure. It presents a fake MFA or one-time code approval prompt to trick users into revealing sensitive information. The document also functions as a link farm, directing users to various external PDF files hosted on potentially compromised or disposable domains, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://contactfm.be/userfiles/files/10506203418.pdf In PDF document text
    • https://egf.tw/test2/images/file/kiwuzekum.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/fed460b557894fbb809de7732431af2a/juwuj.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/tukamuropibugoxavod.pdfIn PDF document text
    • http://carsonandchain-ip.com/userfiles/file/30434392105.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/75271738201.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/92013996803.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/d55o2krmr50urgchhgvlij1883/58859092045.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/7f1c72e19f9146a49727d6f2b83cfb20/31735808656.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/7ac50a1db29d2f5be9f56fe8c7b16f79/10676543104.pdfIn PDF document text
    • https://eijo.in/ckfinder/userfiles/files/6268950952.pdfIn PDF document text
    • https://baongochoa.com/upload/file/45639333100.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c21db359069---58551968373.pdfIn PDF document text
    • http://nomaquito-travel.com/editor-images/5546278578.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/kivajerumotitoxeb.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/24319187631.pdfIn PDF document text
    • http://thietbimaugiao.vn/Images_upload/files/86096676696.pdfIn PDF document text
    • https://davaocarrental.com/images/file/fekejumo.pdfIn PDF document text
    • https://irepairplus.nl/app/webroot/files/userfiles/files/9196350650.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160d7073331807---90753394559.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1612051c38d642---15355139656.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=2015+cadillac+ats+2.0t+owners+manualPDF 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_off0000d606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD606 11112 bytes
SHA-256: ac879cdb14a00bcda17af0d3a3486671943b91e3cae372bb40d687325ee034ed
font_01_sfnt_off0000f022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF022 19016 bytes
SHA-256: 3e4d9d53b3669bd14f75e5d6739c20703ef95fc7047059534cb5827fe37f3235
font_02_sfnt_off00011ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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