Malicious PDF — malware analysis report

Static analysis result for SHA-256 edcce277a206f75f…

MALICIOUS

PDF

78.8 KB Created: 2021-09-22 10:03:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 26684ec7072c7578d22ff25854970273 SHA-1: 5e8125cae20a0711291ea1df2bfe475e037310ce SHA-256: edcce277a206f75f8ce94df5ee49135573310acd104339e8ca88741611e3e284
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many of which are disguised as file downloads, suggesting a phishing or credential harvesting attempt. The presence of a link farm heuristic further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://ski-valloire.com/ckfinder/userfiles/files/lunaj.pdf In PDF document text
    • http://cioccolatogallucci.it/userfiles/file/xedesakebifudowuwipizuwat.pdfIn PDF document text
    • http://msmzizkov.cz/data/dokumenty/49346441386.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/46231050833.pdfIn PDF document text
    • https://amgaa.org/temp/files/8054427967.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/benukovatelimababal.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/nujus.pdfIn PDF document text
    • https://weldingportal.it/userfiles/file/nabupupowiwigeja.pdfIn PDF document text
    • http://jumpstart.mobi/ckfinder/userfiles/files/93542836171.pdfIn PDF document text
    • https://thibiditrading.com/public/userupload/files/67381572383.pdfIn PDF document text
    • http://smelawservice.com/file_media/file_image/file/nuluxa.pdfIn PDF document text
    • https://sunnyrosesschool.com/userfiles/file/75637496321.pdfIn PDF document text
    • https://zabulgaria.org/userfiles/file/dunudufuwinevumeki.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/renepobe.pdfIn PDF document text
    • http://capriololaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kawuzifixiwepagiloman.pdfIn PDF document text
    • http://khamtribacninh.com/images/files/16112746901.pdfIn PDF document text
    • https://ijieet.org/ckfinder/userfiles/files/38536125702.pdfIn PDF document text
    • http://islenapuntos.com/campannas/file/72687189097.pdfIn PDF document text
    • http://historico.uts.edu.co/portal/app/ckfinder/userfiles/files/36966838259.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/godajitibatebonuzifi.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/litizexali.pdfIn PDF document text
    • https://dom4m.by/userfiles/files/zesadekagis.pdfIn PDF document text
    • https://www.displaysdirectaustralia.com.au/application/third_party/ckfinder/userfiles/files/kabilixe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=transfer+files+from+macbook+to+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_off0000d0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BB 17276 bytes
SHA-256: 2aecd0eedba50c3ed250e5d19f84161059340f11f6fcbb57525ab77557b16b43
font_02_sfnt_off000114d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D8 10832 bytes
SHA-256: e561e9e1f2a221d8e4ef622a1724feb8e7134ea2a8dedc2d3fdb8293b777f800

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