Malicious PDF — malware analysis report

Static analysis result for SHA-256 df14f0758a2027ec…

MALICIOUS

PDF

69.6 KB Created: 2021-09-24 18:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 22f254a22019f7afda1079cbd4498356 SHA-1: 8163f46038762692e0c9acb6cf8c486740f7b64b SHA-256: df14f0758a2027ec24c66c74614c08ca29970e387bbf6c6130ccb1e65ad7f882
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically indicates the document's structure is designed to host many links on potentially untrusted domains, likely to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://pistant.ru/uplcv?utm_term=apk+hidden+camera PDF link annotation
    • https://epagneuls-bretons.fr/caningest/images/file/80085040307.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/64668681363.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/mibane.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614dc19b16acd---50986845315.pdfIn PDF document text
    • http://vigen12.com/userfiles/file/kokulamefusexen.pdfIn PDF document text
    • http://flyingwedge.com/uploads/assets/file/lizijutolug.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/77797205344.pdfIn PDF document text
    • https://ayurmitra.com/files/file/padusuvitowitogukex.pdfIn PDF document text
    • http://uzks.hr/upload/datoteke/mujutiferosisuxiredituza.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3674200076.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/3e835029765729ae8ea6772ed9cde5a4/pakukowabu.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/11326818513.pdfIn PDF document text
    • https://www.larche-de-jules.fr/ckfinder/userfiles/files/22547449810.pdfIn PDF document text
    • https://etravelbox.com/scgtest/team-explore/uploads/files/15167631799.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/sarabetegomenosoga.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/juxebuxubexidigeraveve.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/kulewakabosebejajakerizex.pdfIn PDF document text
    • https://sskundal.com/userfiles/file/fupegabozule.pdfIn PDF document text
    • http://hangnhatbanonline.com/upload/files/37498525280.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/10361756306.pdfIn PDF document text
    • https://machinex-machines.com/UserFiles/File/xepiwixejafetolapefinajep.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/lexafovizomuwamoni.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_off0000ae14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC626 17348 bytes
SHA-256: 1bfb40068b9f5723a956a7d261df5f8372e7aefec665b7deb317957919f15112
font_02_sfnt_off0000f249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF249 10420 bytes
SHA-256: 33aee458f0b54839bf9c913c64cca0741448896307c7ee7c78504ec49d9b98dc