Malicious PDF — malware analysis report

Static analysis result for SHA-256 76121b2032d54d42…

MALICIOUS

PDF

199.1 KB Created: 2021-07-29 19:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 28b133f06016d9d317c9cb68f080b493 SHA-1: 7f3218b473d66b3a079a986cc626fcedbf78b42d SHA-256: 76121b2032d54d4202b095b93d5b6ebd741987b2b3a96a8dd63536b88325f938
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to host and distribute malicious files. ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high confidence score further support its malicious nature. While no scripts were explicitly extracted, the structure and URL patterns are consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8654

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://villapellegrino.it/userfiles/files/gapebabirige.pdf In PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/b5e8894678925d32bbf2dae99ee14d3e/61999536084.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kodadowotila.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/eccb7869c829eae9beb41a342b162c9e/teravaw.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/1e0f955db299e49cf67910d4620730ab/gidet.pdfIn PDF document text
    • http://asfalon.com/__files/file/82780663715.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/ron1mbndlsqmu15cs6scs3ud32/badonekebujiwip.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160958a92707ac---14808739866.pdfIn PDF document text
    • https://coolinterier.sk/upload/files/57169426928.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/23559364814.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/xudegusa.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16096a46598b53---48180238548.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160afdee6e7f0e---53294514786.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2c9026855---pimukokug.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/55921329055.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/53v6kpt30n0n8in5vktsnv8g80/93068615683.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/nawebefibowuderigegomaj.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095e1bef1f8b---24583101892.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b381b5c3e5---nakikidu.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c053d4014fe---79358403629.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086228ab4827---99612133028.pdfIn PDF document text
    • http://harrisonfamilyreunion.org/clients/868801/File/lutopijiripu.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/os804k9qob1j7ldj1lgi8fonq9/niram.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=convertir+una+foto+en+caricatura+online+gratisPDF 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_off00029f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29F38 23280 bytes
SHA-256: c5a81e617505d0bdc0b60c2c38353cd74f92c79b60586a7648fa86695fef6e70
font_01_sfnt_off0002d9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D9B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002f1d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F1D0 10708 bytes
SHA-256: 806dc049c1150a3e5d93b8822f963c88354aa88ecd25cdcaf774e39b201308a8