Malicious PDF — malware analysis report

Static analysis result for SHA-256 abdb07edebff78dc…

MALICIOUS

PDF

81.5 KB Created: 2021-09-20 02:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3cc7e8b5702b0a2cccfadb6b158fa0de SHA-1: ea0f3261096f0a2b9ea00e6d29c2deadf7a0d4a1 SHA-256: abdb07edebff78dc9db019471a5179c7858d0551f153050d6975b6f75d90a855
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a link farm with numerous external URIs, many pointing to disposable domains. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or distributing further malicious content via the linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://sz-nuoyi.com/Upload/file/2021092005591657772.pdf In PDF document text
    • http://gunjanjain.com/app/webroot/js/uploads/files/pudegonunomazogakef.pdfIn PDF document text
    • https://network-italia.it/file/gezuxatopexipodofowefanag.pdfIn PDF document text
    • http://firstcuwire.com/file_media/file_image/file/26759068269.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/932bf9097b2899fe0616efac462b986e/78683302079.pdfIn PDF document text
    • https://chongtham68.com/app/webroot/uploads/files/69425031820.pdfIn PDF document text
    • http://studiomistretta.com/userfiles/files/9063980672.pdfIn PDF document text
    • http://profstil.az/userfiles/file/jigopasojikijuxugus.pdfIn PDF document text
    • http://gemaeldeundobjekte.de/uploads/files/womuzaperizutireje.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/7204236797.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/pobamimibamovovumefudo.pdfIn PDF document text
    • https://ferest.ro/imagini_ws/tamulewob.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/pebevuxiwafe.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/3276623879.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/4825888996.pdfIn PDF document text
    • https://www.grdr.org/paidel/ckfinder/userfiles/files/zagomiwisonopumimobi.pdfIn PDF document text
    • http://highgaincomposites.com/img/file/2021911222439.pdfIn PDF document text
    • https://ibericadearmerias.com/file/jebijimem.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user//file/_0201141001630502167.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/vimowarivepopezamipid.pdfIn PDF document text
    • http://webursitet.org/Files/file/74713636529.pdfIn PDF document text
    • http://isotope3.pm-ural.com/uploads/files/52294678670.pdfIn PDF document text
    • http://www.icareonline.net.au/ckfinder/icare/files/gobilotariwurumobi.pdfIn PDF document text
    • http://emblem4home.com/UserFiles/Member/File/naxiwelabapuv.pdfIn PDF document text
    • https://tessuno.com/upload/files/61353b932f095.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=qr+code+generator+no+sign+upPDF 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_off0000d7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F8 18192 bytes
SHA-256: 0be8a9f455c287d18777d6ab1dae47bb93f11480ec9611a81eb60466a8875ad0
font_01_sfnt_off000106ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F03 10804 bytes
SHA-256: 9ef412c4023c981c0e17fea9a00cf2383cd23fdda28dca532bbd850303878b53