Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa2cf51c3c638f7…

MALICIOUS

PDF

85.1 KB Created: 2021-06-30 13:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 02d41b8cf3f44b2f59c78c51bc8401b3 SHA-1: dfea3e3efe747327a758fcdd67c5fdc43b6097fa SHA-256: 2fa2cf51c3c638f7d7763345fda8fc00782a2736abf37ed25f0a45a7bff4c257
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/b5c70efc46c31a27e0f0a6619d430b67/6733645424.pdf In PDF document text
    • http://work4shop.cz/userfiles/file/72231995869.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/84248914277.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c87bd9bfe0---lisixusaniborepe.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/54767079942.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/22427634054.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/bde9cf5f15bdb69009711ca515bda8bb/35766752576.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/70211003092.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd74453cd7---4977324654.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/19767158838.pdfIn PDF document text
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/56032925605.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/zogosodalarapufelexuzozav.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/dotunite.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/57126662804.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/nebefuladijuzedado.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d22b29e94---96674655306.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af75a25af2---70547157616.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/68656041571.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/11cfaeea43eb40e1ff7663efdfaa9adf/kojofumivijaxaniloniperan.pdfIn PDF document text
    • https://chp-travel.ir/data/file/99706808268.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/92d20964c467aff0bc82f6cdd63ae779/finudarikon.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f78cca7611---titaberupote.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c101df7f01f---mominenijegorazewegige.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a789358991c---xutimurajuwidas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=dying+clothes+with+inkPDF 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_off0000ea40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA40 17224 bytes
SHA-256: ddd293ca46ce797a917426b8cf1125f9982daa505c72b35b74d8cd337e900e35
font_01_sfnt_off0001171e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171E 10540 bytes
SHA-256: 7d5785603e2bed99f005a7d7849a6cecdcd6732d245c9574b2ef044132daaa71
font_02_sfnt_off00012f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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