Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d2256edd1f5e61…

MALICIOUS

PDF

79.8 KB Created: 2021-08-29 05:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 12438c3b4ecb8ff53ae353489b480d81 SHA-1: 60e7ffd8ec5bace80936a2d1eb84dd53e85c212f SHA-256: f7d2256edd1f5e616e85116cb44b51b7a4a05008e434238c5fcdf13cb3653eac
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The presence of 'cmd' tokens in the document text suggests an attempt to execute commands, likely to redirect users or download further payloads. The overall purpose appears to be to lure users to malicious sites through a variety of deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://aartipalette.com/userfiles/file/xukape.pdf In PDF document text
    • https://equalland.com/uploads/File/88733007318.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a600f7aacf8---nazeduresebovenoten.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83be355805---vimukeru.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/63221132273.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609e917985d28---mukepabekewakogopirovan.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/8845907850.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/99345609156.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f153b1fff---7115665825.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e3f05c16c---fenuxekowisaj.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c670bd91a4b---ravirivumokajekavevap.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/nusujizorixeg.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/qqs0t430pm55569lrr51q0cmdi/sadodumojidazipogaluzofep.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c48347debc1---nabibutibegadolodijon.pdfIn PDF document text
    • https://genia-groupe.fr/images/files/puzabaxuvowekikux.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607656fea46ff---nujavak.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/90c0faaf0a41391cecf76d8d7e13d1b2/82886382130.pdfIn PDF document text
    • https://weekendtripskolkata.com/userfiles/file/49447609972.pdfIn PDF document text
    • http://webbuilders.com/files/file/lujaxugafabeti.pdfIn PDF document text
    • http://asu78.ru/userfiles/file/xeziwubuvi.pdfIn PDF document text
    • http://www.christianhouseshare.com.au/ckfinder/userfiles/files/wevimaxisaselavimajoko.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/daliparazekubaliramubup.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/manidarokobofikitolutixem.pdfIn PDF document text
    • http://moto-bike.pl/userfiles/file/kevijumebemijefedutafuxe.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/06f77956230690e80efe0bb23edc3e87/19361230836.pdfIn PDF document text
    • https://www.capitalroofinIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=find+subdomains+dnsPDF 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_off0000d514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD514 17872 bytes
SHA-256: f7ec832504a0361ce7971970973158fe2c4fb46b6b31eb91c54d11fcb4bada05
font_01_sfnt_off000102dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF3 10252 bytes
SHA-256: e4977662b11aaed4f96df93ae6f0a311755f42c387e4e9ca1be0676c0aea5bae

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