Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d2aae1ecda27db…

MALICIOUS

PDF

80.9 KB Created: 2021-09-04 09:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d344bd29cb82cd844bca7c90e4c19c07 SHA-1: 9e5a5c2f4e3c17c15ff19ce282def1ffdcb4a2b3 SHA-256: 04d2aae1ecda27db7418edfedda413944cf86d2b458fbf713e26a066262acf09
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a link farm and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://mamtomchabahai.com/uploads/files/files/mabagesotesigugem.pdf In PDF document text
    • http://adamslakeband.org/userfiles/file/11337152742.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160987ad90b083---25912410391.pdfIn PDF document text
    • http://henri-ruch.ch/doc_pub/file/gupalalezosizazasuwige.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/18195648721.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9afdecffa---45607574679.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/17jts1d9uocnl0kojlf98so2fn/83426832248.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/ojicjk6qmdv3ulqphefu4otvfo/30987457131.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/bubeliwuludakasefidajug.pdfIn PDF document text
    • http://mousike.it/img_ins/files/filibapopav.pdfIn PDF document text
    • http://yh-nutri.com/filespath/files/20210902164412.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/dorozutamexevelu.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/18027758700.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161137266a8e46---47395759628.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/e5bb74cc52aab495dcfb5147b10a4340/67584733820.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/3m4vqa2073rujvmrieq2iaaot2/nifegotagotesegexife.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/fudidenuriwamolifaga.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c430c92ae3---vomemuvu.pdfIn PDF document text
    • http://phukhoabacninh.com/images/files/fefago.pdfIn PDF document text
    • https://kangaroovietuc.vn/webroot/img/files/sipujenexugikulirizeximu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=excel+vba+activate+worksheet+in+workbook+openPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/729c072a6cdfdbdb610861185b46c2c0/xebewezadaselamejorekoxan.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_off0000d6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B9 18024 bytes
SHA-256: 244f6daa0db463aecdbf62dd89b8ced79207d7cc957359acc1198772d1a2854b
font_01_sfnt_off00010514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10514 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2B 10940 bytes
SHA-256: 31074c9279bc6671fc5374ca0ce6c6064ca5e9f3ae60bd3d4e2bd260bc2fe282