Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff29c73e41bba578…

MALICIOUS

PDF

80.8 KB Created: 2021-09-01 07:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 59d5fa3545e7e823839fc10f88b49048 SHA-1: 9ba804edd40e5c8b9435bc6c7179dcc5279db02f SHA-256: ff29c73e41bba5784f44dc4849efaa13372978f991314b10a6f65b1df6cf2754
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/q0mqafuro47odt8q7p61taen42/nadofo.pdf In PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/ifahnq0dgnunthuiduk9j4avo4/buwubowepuvuj.pdfIn PDF document text
    • http://zbigniewrodak.pl/galeria/file/5674410650.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/c686528fdf2108f87228ea4b845e4134/69240778705.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/18585007194.pdfIn PDF document text
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/5093849136.pdfIn PDF document text
    • https://olamare.com/img/uploaded/file/23903716036.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/bawodikitimuz.pdfIn PDF document text
    • http://yorkiematch.com/clients/6/65/653dc45b8f6063886304ac4260dbb99c/File/87177241704.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/36020211844.pdfIn PDF document text
    • http://darec.sk/files/files/wenolawiwapimi.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b06b5fdf191---zosanomemetafako.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/vadpkudsaam5fiiuldr2hpll52/budawadowe.pdfIn PDF document text
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/mubemutukejutaxepuvij.pdfIn PDF document text
    • http://nhsclassof77.com/clients/c/ca/caa0b9827732345dad94809623212052/File/vezisezewewafifefu.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/66928285290.pdfIn PDF document text
    • https://eprobatdz.com/ckfinder/userfiles/files/ratoxabobafunu.pdfIn PDF document text
    • https://shidoremicrosys.com/media/76030405330.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-5-10/20210510090212751964.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/99c1qfa2b4o85clnevjh7ilm10/nikubiz.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160807d085238c---28032761812.pdfIn PDF document text
    • http://guyfamilyreunion.com/clients/41950/File/98121795434.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/vasezopifanid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=3+month+old+refusing+bottlePDF 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_off0000d702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD702 10956 bytes
SHA-256: 2467b51a206039369d83819fab3faa96c796f11e1d3c169d756e8daa574478e6
font_01_sfnt_off0000efec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEC 17568 bytes
SHA-256: e53b151d5a5f3f5dea09f8d0d88e68ca199988426d1aa6f18286c374f112c7a1
font_02_sfnt_off00011d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.