Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f1be670b041a46…

MALICIOUS

PDF

81.4 KB Created: 2021-09-20 08:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8876c261568300de2b88186b2bf072b1 SHA-1: 614f141244be72f44d5771b03ff60581428e20c1 SHA-256: a5f1be670b041a461a6d0d23b6374ba2612514dd76c14b57ad28d60bf9938437
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing or malware distribution campaign. The presence of external URIs and the link farm heuristic indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://nomylo.ru/uplcv?utm_term=harry+potter+1+full+movie+in+tamil+download PDF link annotation
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/3799e86bf5c7a21b901cc54c7fc4feba/54767244688.pdfIn PDF document text
    • https://network-italia.it/file/guxojali.pdfIn PDF document text
    • http://palami.by/images/file/jigib.pdfIn PDF document text
    • http://gfb.it/upload/fck/file/rebegitesodamafilifilef.pdfIn PDF document text
    • http://hanauhrova.cz/files/89558540393.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/50488351706.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/kebefozosizo.pdfIn PDF document text
    • http://najlepsietorty.sk/uploads/fck/file/39790504062.pdfIn PDF document text
    • http://mobitransjogja.com/files/22676497007.pdfIn PDF document text
    • https://byocamacho.com/ckfinder/userfiles/files/69241600562.pdfIn PDF document text
    • http://thanhnhomdinhhinh.net/uploads/files/74170839468.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7d71c4e8e---79089807910.pdfIn PDF document text
    • http://taaltoetsvo.nl/userfiles/file/8322129448.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/jujeno.pdfIn PDF document text
    • http://klm-co.ru/foto/ck/files/98279707966.pdfIn PDF document text
    • http://aiaato.com/FileData/ckfinder/files/20210911_41F141AA4B285810.pdfIn PDF document text
    • http://sapaelitehotel.com/webroot/img/files/35377626779.pdfIn PDF document text
    • https://stealthwindow.tw/uploads/files/202109170508023282.pdfIn PDF document text
    • http://thanhnhomdinhhinh.net/uploads/files/507473644.pdfIn PDF document text
    • http://xageunion.com/userfiles/file/jidujugirupetudosiwupe.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/38529725413.pdfIn PDF document text
    • http://lso-msm.com/userfiles/file/8493190087.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/99950131617.pdfIn PDF document text
    • https://reha.bg/content/upload/file/41964158490.pdfIn PDF document text
    • https://nodka.eu/ckeditor/ckfinder/userfiles/files/75924797817.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_off0000d7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7ED 17844 bytes
SHA-256: a76aa42608b5f456eb740871d79502eecef535cebe782af376fba182dec7a891
font_01_sfnt_off0001062c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E43 10900 bytes
SHA-256: 0cf468200c91798812d2573fd87614798718bff5502fbdcff1e5a2a0e8fe72f1

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