Malicious PDF — malware analysis report

Static analysis result for SHA-256 6619b635f10c206f…

MALICIOUS

PDF

70.7 KB Created: 2021-08-30 02:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b8f4b63dcfdd0e3cf9e569f9d69261de SHA-1: 2cb8e81c6fc8124f0123b55370efa6c9090b8a1f SHA-256: 6619b635f10c206f3a76e6d9c9be59b6b7e959123f4ac692c9bd9b7902557b22
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lead users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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 https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3571bdf39b927d802c387521b923f3ec/30868418437.pdf In PDF document text
    • http://land89.com/ckupload/files/83813899542.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2735a8c31c---vojotitezejunitapu.pdfIn PDF document text
    • http://gmkms.net/upfile_editor/2021/files/50705442961.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/malokujutu.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c77243096---94133196170.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/wemokelabuzifogun.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/renova.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/rovujav.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/0a8039ab692611a18356ed7be19213cc/titizolebosozasatokenu.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/fedemulujunubopugodojesi.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076c3631e6c7---lagopigonigolipela.pdfIn PDF document text
    • http://xzass.org/ckfinder/userfiles/files/purizakonoj.pdfIn PDF document text
    • http://standdominica.org/files/files/15934127262.pdfIn PDF document text
    • http://myshopekerala.com/userfiles/file/gefowavogidatosunap.pdfIn PDF document text
    • http://chiron-ventures.com/chiron/home/img/upload/files/210620030421993149d4o72.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/tefagidoteleratuxupot.pdfIn PDF document text
    • http://bijverhoeven.nl/uploads/files/tefotofe.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/16081af2c4e0ba---11318860103.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083db4394900---tozedefi.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2277000e9---botefurugekiva.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823a1587808---35341707979.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/94402764757.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/13261116978.pdfIn PDF document text
    • http://eths1967.org/clients/6/6b/6b000f7c2bca5b3a89f93fde6b54c5e6/File/fidojiporotuvupekarerex.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///fizivetesafuwula.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=another+world+in+my+smartphonePDF 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_off0000b6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ceda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDA 10840 bytes
SHA-256: 7e1f90afbec385cf332c7c1ed731dd87314bcfc500ecf5db94876bcc13fe6a17
font_02_sfnt_off0000e7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C2 14824 bytes
SHA-256: 8aa6b4d89a8dd924544d3ae8ea2c8947637887b2721338c50359ed13561e037f

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