Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ebd90e440986dbe…

MALICIOUS

PDF

85.1 KB Created: 2021-09-10 18:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 41897ebffdde09b26df295b3ec4f66b1 SHA-1: 50af4c62b964db0be7356b962993b896b9c0d0b2 SHA-256: 9ebd90e440986dbe12771ecb190721234df845c2d23891c404aa49f9c857ae09
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the PDF is a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the nature of link farms and the detection as a Trojan implies an attempt to redirect users to malicious sites, likely using embedded JavaScript or other PDF exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380851e1953---55438938910.pdf In PDF document text
    • http://fisioterapiasuzzara.it/userfiles/files/xuvupiwufozagazirawumu.pdfIn PDF document text
    • https://hse.tw/upload/file/66548564532.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/54846851913.pdfIn PDF document text
    • http://aedjtjdshbf.pretty-match.com/upload/files/38281298259.pdfIn PDF document text
    • http://yilip.net/userData/board/file/74216518562.pdfIn PDF document text
    • http://xibuhuanyu.com/filespath/files/20210903095637.pdfIn PDF document text
    • https://botroul.be/uploads/64265648263.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/guwofixuzu.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68250260061.pdfIn PDF document text
    • http://seattleteriyaki3.com/uploads/files/pesuditonebujexagigifed.pdfIn PDF document text
    • http://jfe.hk/userfiles/lukoxaxida.pdfIn PDF document text
    • http://scarpatti.com/files/gulomubaribusar.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/rulogigezevodo.pdfIn PDF document text
    • http://mrhobbscoffee.com/images/uploads/file/mapidoviwamawum.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/29cfae36b2ca8455ded56e60fe810673/zizesujevedutoputiworero.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/wudekozagoritak.pdfIn PDF document text
    • https://chungangroup.com/uploads/files/202109011252047662.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/lajowabekowimisofu.pdfIn PDF document text
    • http://zatexpress.com/upload/userfiles/files/lubajovurajalitu.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/wososoverunebimipumojeg.pdfIn PDF document text
    • http://condominiobrisasdelnorte.com/userfiles/file/63907599122.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/8124156077.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=farming+simulator+multiplayer+androidPDF 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_off0000e889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE889 17348 bytes
SHA-256: 5c64800d326bfe44943701b7cab9e6f73059b502aac0af9b8a3c92d8c2893bb6
font_01_sfnt_off000115d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D6 10928 bytes
SHA-256: 48150fab8d9580bd30150c62cc4591cdf495d19e648c8ec789eba00934b1ec66
font_02_sfnt_off00012eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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