Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea38c43da6b5ea4…

MALICIOUS

PDF

85.6 KB Created: 2021-06-29 06:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c3a0670c09c6c7c3e1edba5e305a3b32 SHA-1: 6994fe14c2c12ec522b9d9df4a6a93ab4a1791ee SHA-256: dea38c43da6b5ea4bb91462cede2023bc82a0206cdb11e9c15c28dd9f2eb6f26
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. The heuristics reveal it functions as a link farm, directing users to numerous external websites, many hosted on compromised or disposable domains. The embedded URLs and the PDF structure suggest an attempt to trick users into visiting these sites, potentially for phishing or to download further malware.

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 https://ascinfratech.com/clientprojects/trading/file/58915394994.pdf In PDF document text
    • http://polletnv.be/uploads/files/lukuzewigol.pdfIn PDF document text
    • https://rajatotogroup2.com/contents//files/35711120487.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/d5559f6718d56b8b730670ef504e6311/30644011957.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a89f1457ad6---64996602396.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606efb41e3cab---92508512119.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/61212035477.pdfIn PDF document text
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4625924653.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/mabakufodose.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b89de9ebe7d---pekawurexosid.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/716a1fa7ead3f7b894500d483fd87d51/garunimovaw.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/549ff2656bcf232138c531d600f799c2/mixuvanabeziliviromodido.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160d574c37cf9d---tidamajaw.pdfIn PDF document text
    • http://cobansut.com/userfiles/file/55026099150.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/navad.pdfIn PDF document text
    • https://unserbiokorb.ch/userfiles/file/vumajimukagas.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/1792549fd9c21956ca3531c5e37735c6/vupoxelil.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16087506b5f5e9---kenijumuzow.pdfIn PDF document text
    • http://tinnaduraflex.com/uploads/files/14336131361.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5bfe37dc3---jiperobenipu.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/da902c50d44f7d82c54e14cf88147159/ronodobezi.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/xiroti.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16070150ece84b---84528816966.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=healthy+baked+applesPDF 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_off0000eb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB43 18140 bytes
SHA-256: b3464b8bda6a7c5d047804cf90369274c71c43079e3796e3c0a0e113721088d2
font_01_sfnt_off000119a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A4 10412 bytes
SHA-256: 817a5c810b3a8d3d5012fb815cb6274458fa640df75646bf43fca6d2a04d88a9
font_02_sfnt_off00013125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13125 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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