Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f59123f5046a6c…

MALICIOUS

PDF

87.3 KB Created: 2021-07-06 19:13:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cdaaa6280f6c21badf7e8f1c46f3e46f SHA-1: eba854b7413be52895b73aab8e09c9d88544f140 SHA-256: 02f59123f5046a6cb37f15dbe559362a705627fed5f855ebfe8941f8d0f7f93b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised websites and disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the link farm structure is a common tactic for initial access.

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://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/39919190849.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/vi3rf7dfp27et42m6utof2em90/52864677184.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607afe6e838ce---wotexoxoxuranije.pdf
    • http://volamtuyetthe.com/userfiles/file/9281085641.pdf
    • http://fullcolorspandoeken.nl/userfiles/file/wogewozu.pdf
    • http://accessiblevehicleservices.com/userfiles/file/64937612302.pdf
    • http://webelievedin1984.com/clients/6/67/676624d6593aa512bfa6e10e765af00e/File/xuzuzeja.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3775e60c8---vuzovemom.pdf
    • https://hzautomatisering.nl/userfiles/file/dowomujurubazem.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/2lfj68dj4ltd7dfgd9l01u97c7/40666830952.pdf
    • https://pasarantogel2.com/contents//files/timazor.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/v2uri4dui1sifmt1vb095cm698/29064229912.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743f18bc813---33561639900.pdf
    • http://resetimpianti.it/reset/public/file/16566681753.pdf
    • https://alshamiltrading.com/alshamilfiles/file/zesijotuv.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e77b5c45f---37899071573.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b58502b92---62946382507.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/6pan92cg54g1737bvueuibcdo7/75610554955.pdf
    • http://galgalesh.com/userfiles/file/82732944429.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3ef8cbe2c---25952975048.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/c348e20e8daa0db3820bc98967545094/93905572515.pdf
    • http://15889163.com/ckupload/files/nololixafakajapaki.pdf
    • http://toyteepee.com/uploadfiles/file/210701215542635584jhtgs1.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/61ae882c4661c51e905a71e8792d1a8a/14130437823.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=what+do+plants+need+to+make+oxygen
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2a9.bin
e3b56588d9283281aa25d7afb2d1bc56627a2bc5bbbb0ec8228219a8582991cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A9 16344 bytes
font_01_sfnt_off00011d19.bin
b3f52bb2c370f0828f5cbc6d550bee26d44c4da1269ea0be0bb2cd17cbd49a57
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D19 10948 bytes
font_02_sfnt_off0001362a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1362A 16792 bytes