Malicious PDF — malware analysis report

Static analysis result for SHA-256 a935cd12eae5f12d…

MALICIOUS

PDF

81.5 KB Created: 2021-09-16 15:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: a087e16413937dfda260b1e009ac1fd4 SHA-1: da9935c99968359ccb2e254908fc06bfc18dbe21 SHA-256: a935cd12eae5f12d548857459621f4a3461910f0d456f1d5090f0ebc1cf1d21d
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 of which are hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://oniceh.ru/uplcv?utm_term=conjuring+1+full+movie+free PDF link annotation
    • http://videocycling.info/files/file/maveketubebejigumosiwaj.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/duxepunotosovakedozili.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mudejitakebepapixu.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/wezibamajil.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/64826105139.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142a269a6b8c---67172386290.pdfIn PDF document text
    • http://wxbeimei.cn/upload/ckimg/files/202109090700139341.pdfIn PDF document text
    • https://get-insurance.in/ckfinder/userfiles/files/sugevipuwip.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/ferupefenimekomado.pdfIn PDF document text
    • https://gloriamus.org/Uploads/userfiles/files/52222694251.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/4a3a117b7771083056d6a4f4d0819fab/38926308503.pdfIn PDF document text
    • http://valkexclusief.reviews/app/webroot/files/userfiles/files/sojebifenamulimi.pdfIn PDF document text
    • https://znalac.com/userfiles/file/24044858813.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/21504346510.pdfIn PDF document text
    • https://taucaotoccatba.vn/images/news/files/bevipegudexutubu.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/gogidijiboduwaka.pdfIn PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/pelorarazo.pdfIn PDF document text
    • http://eva.am/files/08274bea97b65751.pdfIn PDF document text
    • http://noithatachau.vn/webroot/img/files/rusizepetagulunug.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/57395620538.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/53883533682.pdfIn PDF document text
    • https://holcom-wd.com/webroot/img/files/vurapixutefamulevurexeban.pdfIn PDF document text
    • http://vaynhe.com/upload/files/8044247996.pdfIn PDF document text
    • http://bodemveenweiden.nl/bodem-veenweiden-img/5432060006.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_off0000d880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD880 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF097 10508 bytes
SHA-256: 8755a60cb165220c7c7a4f58ab60e0b216e63e1d0c1449d27c4e8c8311998df3
font_02_sfnt_off0001087c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087C 18372 bytes
SHA-256: f356874020cf1b1e303486eff541fcdce0ff01d7537c81a877a46e97f0364cf6