Malicious PDF — malware analysis report

Static analysis result for SHA-256 e969ad28d556995f…

MALICIOUS

PDF

81.4 KB Created: 2021-09-19 18:19:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8367fa6d8ed80ccf254c6cee3d586c05 SHA-1: 5391903f7d5ef2ace33192151094573c3ee9635b SHA-256: e969ad28d556995f538443d2978e8ba3fa91021fce0acb9a945e40b0b7fe5c4b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It contains numerous external URIs and link farm patterns, suggesting an attempt to redirect users to malicious sites. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a focus on creating a network of links, likely for phishing or malware distribution. No scripts were extracted, but the overall structure points to a malicious document designed to exploit user interaction with embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 https://pixomot.ru/uplcv?utm_term=123+hd+movie+download PDF link annotation
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/kivolanubifi.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/dumamutade.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/53892397339.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/biwexataxonulogaresuwu.pdfIn PDF document text
    • http://brava-ekb.ru/userfiles/file/seserifubawumukufix.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16135d1fc2020f---xuwokakokuvijivetazavux.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/3i6cut7pid2dddieq1kc443khr/gasitozofigavojipivet.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/83333705691.pdfIn PDF document text
    • https://euchebnici.com/img/file/61742339107.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/57940556134.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/86584849032.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/jiviweritinazosam.pdfIn PDF document text
    • http://bacvietexpress.com/upload/userfiles/files/sugajetizokixununanonumub.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613184c07cf8c---14486731123.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/ae1fpnqk5vq3qjcm575s0ia2t0/69650562412.pdfIn PDF document text
    • http://viethanit.vn/hinhanh/file/pidedo.pdfIn PDF document text
    • https://mimpishio1bet.com/contents/files/xuzabajilesesod.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/8712560497.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/37528236042.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/kikojodub.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/suvixa.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/83186593432.pdfIn PDF document text
    • https://ldoris.com/upfile/files/20210904035100.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a510e0a058---zumosekibilipixudux.pdfIn PDF document text
    • https://www.premiumtrade.ro/ckfinder/userfiles/files/42953735141.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16131864ca140b---54353874849.pdfIn PDF document text
    • 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_off0000db3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF353 10548 bytes
SHA-256: 3aec6dbeed882cbb151e221ee48d3fefccbd84943e1094643f37cb24df479e33
font_02_sfnt_off00010b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B32 17344 bytes
SHA-256: 23b63ccb2c58e0c1cce1f37e96c152770512b88b0c8972e16a9f27230959fa9b

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