Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba038110f0afb8f6…

MALICIOUS

PDF

106.8 KB Created: 2021-10-04 12:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0261a6de7420425778c1ed7545cdeb8f SHA-1: 84f5be8b782572a28f621bdfb830f5f9b2cf72c7 SHA-256: ba038110f0afb8f6c3c4027a7a71dd661e457a8409563996636ba35c4a48248e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and the link farm heuristic suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://irlanc.ru/uplcv?utm_term=read+50+shades+freed+online+free PDF link annotation
    • http://musthighschool.mn/ckfinder/userfiles/files/zoravezokabikufirev.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/57832516750.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/lusunefetofatonamejelofi.pdfIn PDF document text
    • http://hstairan.com/FCKeditor/editor/filemanager/connectors/php/userfiles/file/rafazuwijenotufede.pdfIn PDF document text
    • http://parkety-patemal.sk/files/file/37153418789.pdfIn PDF document text
    • http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/mowofikujadobiwiwu.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/52552866328.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/15349056026.pdfIn PDF document text
    • http://gbfrjournal.org/pds/userfiles/files/davatikipi.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/kupixodexuxulebixepopime.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/73615666411.pdfIn PDF document text
    • https://zlatartopalovic.rs/files/sopetoxan.pdfIn PDF document text
    • http://studioassociatoemc.com/userfiles/files/sorusarijebev.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/17890529055.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/93506411910.pdfIn PDF document text
    • http://gz-chengeng.com/uploadfile/files/joposebuma.pdfIn PDF document text
    • https://pspgenuine.com/ci/userfiles/files/vezokavutaba.pdfIn PDF document text
    • http://infiniti.e-library.tw/uploads/files/vifolipasezeboz.pdfIn PDF document text
    • https://penzion-palice.cz/content/kafojadurudatolifox.pdfIn PDF document text
    • https://galafrica.actstudio.ro/app/webroot/ckupload/files/89171354113.pdfIn PDF document text
    • https://noursportevents.com/wheelmarine/userfiles/file/66360212870.pdfIn PDF document text
    • http://capableapp.com/uploads/files/kasofixej.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_off0001364a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1364A 21132 bytes
SHA-256: 40b01f37f2a53b92ec8202dfc14598f584dfdef79c7bffbd6540426e63f51743
font_01_sfnt_off00016d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001852f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1852F 10656 bytes
SHA-256: 6365d2119fa474d458c4ee2bc4627ec188135b5d3ba12dd06034a0920958ca93

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