Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e7f63890a20a46…

MALICIOUS

PDF

72.3 KB Created: 2021-09-26 08:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 831dca5ce7833b8359edbbc7a066cc26 SHA-1: 217a73069054bfd7db0ad3356dcaaa36c22fc1c9 SHA-256: 35e7f63890a20a46eee9036c05b8daa3bad67e60c5a7251579d98c588dfdd1ed
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and a high number of external links, many pointing to disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection or execution of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • 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 http://fiorenzuolatrack.it/userfiles/files/54476786022.pdf In PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/9f59e4596c6cc294e3ff0613e6f5be30/68319300474.pdfIn PDF document text
    • http://bscartridge.com/pic/sivaxixatitukuluzif.pdfIn PDF document text
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/11268965657.pdfIn PDF document text
    • https://partetesal.ir/data/file/58085310383.pdfIn PDF document text
    • http://maksimetall.ru/files/nidir.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/roxipidulenu.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/49954026238.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/1208036928.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/18703615095.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/kekej.pdfIn PDF document text
    • https://martan.es/cenavarra_userfiles/files/63164130334.pdfIn PDF document text
    • http://sowaprojekt.pl/files/file/71500635013.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/87419824554.pdfIn PDF document text
    • https://weboonline.com/ckfinder/userfiles/files/zutowidif.pdfIn PDF document text
    • http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/wovimomafaxi.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/87275005342.pdfIn PDF document text
    • http://josquin-capella.de/download/lurigiboxunukon.pdfIn PDF document text
    • https://myvideoclasses.com/ci/userfiles/files/kijalepesexilozexazora.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1614222f476ffe---vakipapapo.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/38270348011.pdfIn PDF document text
    • http://draftingfloorplan.com/ckfinder/userfiles/files/fanedefufumasoxofozuwili.pdfIn PDF document text
    • http://sbkf.org/files/files/34346808712.pdfIn PDF document text
    • http://toanlinh.vn/upload/files/12002680068.pdfIn PDF document text
    • http://dtmaso.com/public_html/Imagens/file/wabibiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=best+fortnite+skins+for+2000+v+bucksPDF 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_off0000b2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE9 10816 bytes
SHA-256: e9a2ae89e2c49193eb6abe899cbc38f8abe41f6da03ae4097ffc5acc6378a96d
font_02_sfnt_off0000e41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41C 18452 bytes
SHA-256: 2d9105cccfef7d1ef4186c6f0311652ed0201ae5bb06db79ce26a4124374cc49