Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2dd5eae7909b562…

MALICIOUS

PDF

85.9 KB Created: 2021-08-16 16:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3732205e0c81fa84bbf7278b27f63d31 SHA-1: 37fe19e2587cc4ff7853a117e4f6bcaa5af01e62 SHA-256: e2dd5eae7909b56250367932a36148506ca71df1bb3b4f6fb50d086ec9194512
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm with numerous URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a phishing or malware distribution attempt. Security tools like ClamAV and an ML classifier have flagged this file as malicious, specifically as a phishing trojan. The presence of multiple external URIs and the link farm structure strongly indicate an intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://barcabianca.eu/upload/file/9716028382.pdf In PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46390700642.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f8009c36c---55733466924.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/badogam.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/87889390461.pdfIn PDF document text
    • https://unifor975.ca/userfiles/file/vajerumabavadanusoxe.pdfIn PDF document text
    • http://flexicourse.cz/res/file/47468822725.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/48943851138.pdfIn PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/zikefewewepakuz.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/duzol.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a89e858b4ad---favipozu.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986832663fc---rejowizamabikomag.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/77166547958.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/6r2d4tmmd6fj43ng51f98mfbd7/josibiki.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/s35o1rgmfdiddg01uoouotvu6m/52837549513.pdfIn PDF document text
    • http://diamant-x.sk/UserFiles/file/fatamojuxiwekob.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7ff296b0b---belutulowoxunetizan.pdfIn PDF document text
    • https://aedwea.com/upload/foto/fimetipe.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb3c717573---83374669703.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/88009024551.pdfIn PDF document text
    • http://yoron.net/up/files/nugakojiwasavumup.pdfIn PDF document text
    • http://esejsc.com/upload/files/73417839003.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/3829411517.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=what+does+jekyll+and+hyde+personality+meanPDF 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_off0000eb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10392 10984 bytes
SHA-256: d797991163390e758248f77e880115322c2701d73f6222ec4ac010491d6deb0d
font_02_sfnt_off00011cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDC 17760 bytes
SHA-256: 8bf253e99cbdd95b75b4fca7968443d1955ba2d71f7c4611862defd17e951b33

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