Malicious PDF — malware analysis report

Static analysis result for SHA-256 06dc5ab7a19da2e9…

MALICIOUS

PDF

87.8 KB Created: 2021-09-13 03:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f742b378ceb13f04afe393ca4373cab9 SHA-1: 81539bba8c2e12873b53b5e9511de03c48293686 SHA-256: 06dc5ab7a19da2e911113d84d71f2d8ca61f88eac56cb93a0f16f197965b9b1d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm with numerous URLs hosted on disposable domains, suggesting a phishing or malware distribution scheme. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further supports this, indicating the document's purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e8aac85b41---liruxerefofoz.pdf In PDF document text
    • http://jtg-antracyt.pl/files/file/gogin.pdfIn PDF document text
    • https://megashina24.ru/files/files/40937941321.pdfIn PDF document text
    • https://franchisebusinessadvisors.franchisebrokerwebsites.com/broker-site/files/files/wigitetavaremo.pdfIn PDF document text
    • https://etest.vn/app/webroot/uploads/files/xugakuro.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/27184662846.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/merisemavarakesur.pdfIn PDF document text
    • https://muzpony.de/obrazki/file/46701711143.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/68100906318.pdfIn PDF document text
    • http://gurolmumcu.com/userfiles/file/lovifakobodopof.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/fafuguvazefenimoxojor.pdfIn PDF document text
    • https://amt-alarmy.pl/userfiles/file/74400694019.pdfIn PDF document text
    • http://futboltotal.net/images/files/tuvotoretijotevusufe.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135460f833c4---98551691139.pdfIn PDF document text
    • https://network-italia.com/file/39753743396.pdfIn PDF document text
    • https://jocafoto.com/fotos/file/vozuxozid.pdfIn PDF document text
    • http://www.sm.ac.th/ckfinder/userfiles/files/81845907924.pdfIn PDF document text
    • http://termocity.by/pics/files/93475665395.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/sojepebuborinonawitiwawes.pdfIn PDF document text
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/4688123294.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/22343523779.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/nodogodamobog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=assassin%27s+creed+revelations+2d+apk+downloadPDF 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_off0000eac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC9 19996 bytes
SHA-256: 8704bb3ec8272819df4b42ba5875321157ea1303fd80a889ef75f0b7610e35cb
font_01_sfnt_off00011e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7D 10888 bytes
SHA-256: d53c594649fa3c13128c836bde53cf2d344f0647d968c19fa3860ba9e0754df3
font_02_sfnt_off000137fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1