Malicious PDF — malware analysis report

Static analysis result for SHA-256 2864af94cf069126…

MALICIOUS

PDF

92.4 KB Created: 2021-09-12 17:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 2fd4c0cd7de5bb59f3635692f75a4659 SHA-1: cc401486abbf8393adbc3a2b5682723203b9451f SHA-256: 2864af94cf069126a55599f658e380b09eca9f06bf1cb33f2cab9f22038c15fa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a QR-code lure. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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
  • 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://eventclub.pl/userfiles/file/vegibazeboxilag.pdf In PDF document text
    • http://apartmany.cucoriedka.sk/data/files/4819039310.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/1b75ba8baa1ae30854d6f7ea603d69f0/31789570095.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/tinobabujudelafaxigu.pdfIn PDF document text
    • https://hongmao.tw/uploads/files/202108312012145014.pdfIn PDF document text
    • https://stop-remont.ru/ckfinder/userfiles/files/66830131138.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/tapozodefimamirunaru.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/4250118973.pdfIn PDF document text
    • http://daiquangsico.com/img_duhoc/files/remozomifowov.pdfIn PDF document text
    • http://e-junghan.com/userData/board/file/6467177651.pdfIn PDF document text
    • http://conservativista.com/js/ckfinder/userfiles/files/wamuzuzexi.pdfIn PDF document text
    • https://matricula.arendic.cl/files/23809557174.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/44461284725.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210902_E12892CF6777F388.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/22112751554.pdfIn PDF document text
    • https://www.ftha.org/admin/ckfinder/userfiles/files/vilobufoxugusesamapowogel.pdfIn PDF document text
    • http://thibidi.vinadesign.info/uploads/images/files/nupuvogego.pdfIn PDF document text
    • http://duhochoangthanh.com/upload/files/93268366837.pdfIn PDF document text
    • http://1day2night.com/UserFiles/file/zolemoruva.pdfIn PDF document text
    • http://theclelandgroup.com/img/upload/file/jemoxavunixixazolu.pdfIn PDF document text
    • http://mezon.jp/userfiles/file/xatajegato.pdfIn PDF document text
    • https://ixiu-23.com/uploads/files/202109081545405113.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/93230872262.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/19776327142.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=the+bachelor+australia+2019+watch+online+freePDF 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_off000102a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A3 17636 bytes
SHA-256: 6cd1fc289b91f53539dd3f0e54e2d6d877ed9d91bc801453506cc7856065bdd8
font_01_sfnt_off00013129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13129 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14940 11184 bytes
SHA-256: 24191ce3a81d178a9f4ae6db78f0309cd974cce91434e017a8244fe29d887ba7