Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed04a68c04de6f66…

MALICIOUS

PDF

69.2 KB Created: 2021-09-06 16:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1ddef30b6a8babea638fad4492944c47 SHA-1: 6f28f09c283af05bae3fa6355153f777590e9c2e SHA-256: ed04a68c04de6f669060faaf218dadc9035c4922f8f0a097fbf01c0420d9f4e6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm or downloader. The presence of embedded JavaScript points to T1059.007, and the overall nature of the file suggests it was likely delivered as a Spearphishing Attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://bisnismedsos.com/userfiles/file/jazowokivegarunasesud.pdf In PDF document text
    • https://torbay.ru/images/uploads/file/11382583120.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a4375363e31---zepafukubalatog.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/44832602849.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/57205247226.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/5d6fcc99f0b98868d008a87eb580f984/36275387235.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/pizuw.pdfIn PDF document text
    • https://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/farizutitupodovubeduxe.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/0915dea6145eaa5a9bee9e4df79e9228/kusimopikef.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e871068740---lususaketizefaxi.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/pexogamewowu.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/nufogawogisu.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16084ff7d39c2c---silofuxegepetokozeziduvar.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/80798583859.pdfIn PDF document text
    • http://scea.edu.mn/ckfinder/userfiles/files/vuxalifixo.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f07124a0be---daraxevirasofew.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/fowezalisimogodi.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/jipemepozovowasene.pdfIn PDF document text
    • https://dom-titan.rs/files/19772468607.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=androgenesis+in+fish+pdfPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/8234ceca17683f174c522f8f42b50048/63733955926.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_off0000b269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB269 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7B 15000 bytes
SHA-256: c0581a08df8ae8cd0bb6a73a2d7848087c34ee9be0acecce3852926809d8a3ef
font_02_sfnt_off0000f035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF035 10452 bytes
SHA-256: 61e25058d32b4a5992c0c557c66c38d8dcb9a13a44d2fafe83d1136ce8930666

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