Malicious PDF — malware analysis report

Static analysis result for SHA-256 b032eeef314af1ff…

MALICIOUS

PDF

85.0 KB Created: 2021-09-15 10:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d798f0cedae9525cfddff2645abaec3d SHA-1: 2d1a8e4379ce637c3608092207684ec80e90f95e SHA-256: b032eeef314af1ff4b01f70bff3abd164e17a4380c05ea861a67f38ff078814d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to suspicious domains and identified as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the structure and URL patterns suggest a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://phupmirpol.pl/userfiles/file/75551021702.pdf In PDF document text
    • https://vresponse.net/userfiles/file/64575155977.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/xobuxevo.pdfIn PDF document text
    • https://baruipur.org/ckfinder/userfiles/files/22177811987.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/86138180367.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/25547186401.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/6605354063.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141909187c3b---xopime.pdfIn PDF document text
    • http://balashixa.inhome360.ru/admin/ckfinder/userfiles/files/37699301516.pdfIn PDF document text
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/87835560219.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/79129024690.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210909222715832.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/82672238382.pdfIn PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210912051531.pdfIn PDF document text
    • http://huiking.cn/uploads/file/011910163417.pdfIn PDF document text
    • http://alajwakh.com/uploaded_files/userfiles/files/41273387070.pdfIn PDF document text
    • http://thenext.pk/userfiles/files/16396850037.pdfIn PDF document text
    • http://asacnfservices.com/ckfinder/userfiles/files/61888747518.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/600cf09552c309fa14047c22249d6740/98275430591.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/novetixijono.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/53213902003.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/torus.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/zojofet.pdfIn PDF document text
    • http://esebtekstil.com/resimler/files/vubibapejifereni.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/wafodutefofin.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/jonotawuxiso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=get+the+latest+android+updates+available+for+youPDF 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_off0000e413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE413 11056 bytes
SHA-256: 32cdaa4d40988361151bf73c359bcd226c6770365dfa8135623e1e2a8ad77ad8
font_01_sfnt_off0000fd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AB 18440 bytes
SHA-256: deb5a396267284d3a204449eb1c3c9a2081c5ad0044a5313fcc31b1abcfbf90e