Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af1d3834e26fb92…

MALICIOUS

PDF

71.0 KB Created: 2021-09-29 00:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 0172646d5f644b074213f2bde1445bbb SHA-1: ed7717720aca4fe15f4c587b95a818a85b88d5da SHA-256: 5af1d3834e26fb9260b5be1651fc67969d5383955378e3d04eee02f01f9b493e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, many of which point to disposable hosting and are structured as link farms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and external links are consistent with a phishing lure or a downloader for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://catamma.ru/uplcv?utm_term=amma+i+love+you+kannada+full+movie PDF link annotation
    • http://t-eamplus.de/web/editor/files/79536220733.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/vesubipugir.pdfIn PDF document text
    • http://vp-dmsh.ru/admin/ckfinder/userfiles/files/sakigurisoxobanivasere.pdfIn PDF document text
    • http://special-pharma.com/upload/files/topivazokotazuwowetapa.pdfIn PDF document text
    • https://ssmavidiyar.com/public/content-images/files/72041626032.pdfIn PDF document text
    • http://sithome.com/upfiles/file/20210915172406.pdfIn PDF document text
    • https://adtw1.elfjane.com/ckfinder/userfiles/files/tanizufizij.pdfIn PDF document text
    • http://eichler-kammerer.de/sazilivedorobiruze.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/89591197875.pdfIn PDF document text
    • http://safiorida.nl/operatori/userfiles/file/46746377800.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/56610061743.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/358c2ad74c75d49cd53f93b85950ca60/xasijezixinugubizemefi.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/46652353014.pdfIn PDF document text
    • https://duythanhsd.webthoidai.com/img-dn/files/nilanakobel.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/xogugejenejimirup.pdfIn PDF document text
    • http://normel.org/files/upload/file/dixebuj.pdfIn PDF document text
    • https://xn--80aesyq.xn--p1ai/files/file/20511551922.pdfIn PDF document text
    • http://naturenhuman.com/app/webroot/userfiles/file/20410871730.pdfIn PDF document text
    • https://chatham-ebenezer.ckdomain.com/uploads/userfiles/files/70548497936.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c84c952e8---xepisowivikem.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/60136746666.pdfIn PDF document text
    • http://katour.ru/admin/ckfinder/userfiles/files/28700922086.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/99618709038.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_off0000b239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB239 10504 bytes
SHA-256: 84c8a872b004ccb582873688e17bc62e258ec2aed64d92079d4507fab01bc939
font_01_sfnt_off0000ca13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA13 16604 bytes
SHA-256: 9248db98ba8ae1bdf54b8d0fb5ac2f4281828421e2847f9e48f62a024b24e338
font_02_sfnt_off0000f43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.