Malicious PDF — malware analysis report

Static analysis result for SHA-256 f33fee300dc8e07f…

MALICIOUS

PDF

91.4 KB Created: 2021-07-07 14:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f04c46c6177176eead1ba3fc6d98bc6f SHA-1: 08077f03d6001487816dabf4f7ba1b0f301b70d8 SHA-256: f33fee300dc8e07f053d834008f1cee76e59019fde5744a86e573b1223a3a24c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress sites, likely serving as a lure for users to download further malicious content. The presence of multiple distinct hosts and a high number of links suggests an attempt to distribute malware through a deceptive pretext, such as a resume template.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608360c10ee7a---93728659248.pdf In PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078aaa6c1367---fazafipolofezafox.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/7mh7n1do8um9ktpcr3c34a5is6/24646121029.pdfIn PDF document text
    • http://balone.net/_upload/file///bidobarupelogiwob.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/1112bbc6d35ed61cc8a088b5b71793ee/furuwitubuvopojaxinuz.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d8fe13dea---13787079115.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab71c0edd03---82025120620.pdfIn PDF document text
    • http://aquinasnb68.com/clients/9/9b/9b9a52ed12f3b440fa02b6ce64642487/File/89888360223.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/2197587559.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/sokebinagejosejas.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/43592e09e745c36735f127c173997678/6358244899.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/jiseporipudazisamizisi.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/gezetasefujasivifemukik.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/2a0b5d125934ee2272ef5b9573aabba6/35779941074.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/cs1ijmlnjkf10rkp10au7petn5/saduxafijodovuxerubutadup.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/jelilof.pdfIn PDF document text
    • https://bio86.net/fichiers/vusopavixapemone.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/1c31183c1e3fd7e883b68cd478f84ed0/16965480616.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609c94ea61f8e---toduduni.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/lixuvewoxazenogamidap.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/vaxarukutuwagukujiku.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784ef5348c4---10461103471.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=resume+ppt+templatePDF 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_off000105bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BD 16916 bytes
SHA-256: 732d2c2923a92ce3a85d78b6b76106c065e99b372498bb84828e78b4422eccb1
font_01_sfnt_off000131d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000149f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149F0 10140 bytes
SHA-256: b7a31e058cb347136a3598f0010ba82aaa38c2ebc42b32aab7359d08936d2e4a

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