Malicious PDF — malware analysis report

Static analysis result for SHA-256 7065a2c2b8a4676a…

MALICIOUS

PDF

76.0 KB Created: 2021-09-06 08:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 306d00796d3f4e78a4202fa0c7b94ebf SHA-1: e37a65716962c103aad513fe6cc1c52fada14043 SHA-256: 7065a2c2b8a4676a9b4e0c2741cd979ef81eba77759898b1294db8f07404b85e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous links to external PDF files hosted on various domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term=home+strength+training+program+pdf' in one URL indicates a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://robalton.es/Albums/images/file///84570730093.pdf In PDF document text
    • http://1careglobal.com/upload/files/rivafozulukarakaxunopu.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/rozosekaxopojomojaf.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/d1d79ecc95619f639cd27054631f472c/nubexipekatebubu.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/0f099e0e4c7c5f5c9c4ebd454846e16a/jadopizevekibuzawojobepen.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/86411432659.pdfIn PDF document text
    • http://www.conectadoscomdeus.tv/arquivos/file/josepawobasi.pdfIn PDF document text
    • https://koratspring.com/upload/file/sipuverufufub.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/betomonutixulikatuvut.pdfIn PDF document text
    • https://sabunwangi.com/contents//files/11192043912.pdfIn PDF document text
    • http://foodzipo.com/uploads/userfiles/files/medatutu.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/xoxovofalenolatavagevono.pdfIn PDF document text
    • http://donaldbermanmaimonidesgolf2020.com/clients/0/0d/0d43fbb8ff91cab41fa1b056c0d912a9/File/konagesi.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/ssju120s5p29g8e3tsi8127urt/9730377562.pdfIn PDF document text
    • https://goldenapp.net/file/tekomonebefijajuje.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/93349d9156c68084d208a9e0f4c1f338/toguvof.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/kumosudajunulafafe.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/06/12/file/20210612_111415_159.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/70435226445.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a579dd5601---tibubobojex.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/tizapenuvafip.pdfIn PDF document text
    • http://kolkandkolkdesign.com/site/data/ws/files/pawomupetimafapenomu.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/jakojilabigorezu.pdfIn PDF document text
    • http://sapaelitehotel.com/webroot/img/files/nobonabuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=home+strength+training+program+pdfPDF link annotation
    • https://unimedbelem.com.br/painel_template/assets/global/plugins/ckfinder/userfilesfiles/21664117136.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_off0000c656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC656 16840 bytes
SHA-256: 9d36a86cf12fd467d67aeec7fbf2faf5ada3e9829c9f96492d8ef9658b841264
font_01_sfnt_off0000f1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C1 10888 bytes
SHA-256: 0d02576b98a1d83cdb97dd2a7dd689afb351ea5b7abace954552d943cd3a48a4

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