Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2de4207eb15860b…

MALICIOUS

PDF

84.2 KB Created: 2021-09-04 06:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b1a7934319ed984b618518fd1b0b9392 SHA-1: 1ac10134dca2f399216b842875457ef98817964d SHA-256: c2de4207eb15860b5c0411f2d64936b7ec0e946ef1c5ca40420bb67299e53e90
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, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://casier-a-bouteilles.com/file/38064123085.pdf In PDF document text
    • http://www.petersonassoc.com/emailimages/file/74688666861.pdfIn PDF document text
    • http://ltptech.vn/uploads/userfiles/file/68483393684.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/59334936476.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/21162378257.pdfIn PDF document text
    • https://csodamalom.hu/files/files/rajovizovonoriwagimugej.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8ed092dc3---12934053652.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/27652584014.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160828300e5739---firaxanifurejaroxexu.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/wovofum.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/0b7vvm9avlokpqn9d0dlc2nsr6/54694458955.pdfIn PDF document text
    • https://gym-rectif.fr/ckfinder/userfiles/files/vonirowuwubakubojisiba.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9fa6b6b72---sukozopumutajokudumamemo.pdfIn PDF document text
    • http://abnicum.com/files/file/60442183191.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/xikum.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b23ef551e59---85852852217.pdfIn PDF document text
    • http://fairtradeportal.pl/userfiles/file/wulixeladusafaxituxeleke.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/watofuperarazabamifufen.pdfIn PDF document text
    • http://www.proyecpapel.es/ckfinder/userfiles/files/30900480328.pdfIn PDF document text
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/297c277da48105b0e5c53380b614c78f/92550424234.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/lamirezufafavitaleb.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1610734d62d6d3---1308590284.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb75a21790---tatotinigege.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/45624947700.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/936062b402a93596d1752d2f51b654cf/xalesebufefugoxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=persuasive+essay+topics+pdfPDF 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_off0000e6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000feea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEA 16772 bytes
SHA-256: 9c32b6cf731ce41f588474b5c606d0fa150d182dfe853859af50920f508b6d79
font_02_sfnt_off00012a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3D 10744 bytes
SHA-256: 9814c9525f92450fc9d64e6309a9e83ce80fca5aad37def67928694e0343aa25