Malicious PDF — malware analysis report

Static analysis result for SHA-256 297f685712462a55…

MALICIOUS

PDF

89.1 KB Created: 2021-09-13 13:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 06b576b53c78630a6276e497b463af26 SHA-1: c4cada19d58b057836467bad9019ba72275822d7 SHA-256: 297f685712462a5534f14a542da2e88279db86cab8318d54df8356cbd1285ab8
172 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of urgency lures and download buttons further supports a deceptive purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 8

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bjhtdszdh.com/v15/Upload/file/202195655461180.pdf In PDF document text
    • https://fonixkoncert.hu/upload/file/madufetijoxejovejesape.pdfIn PDF document text
    • http://noithatsah.com/webroot/img/files/51816756148.pdfIn PDF document text
    • http://pravkniga.ru/files/userfiles/files/pamokede.pdfIn PDF document text
    • http://adbuilder.at/ckfinder/userfiles/files/jowekuxuginalekogotu.pdfIn PDF document text
    • http://bige.vn/uploads/userfiles/file/77044749888.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161367ee722138---29167185315.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/lomozuv.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/92574338530.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/16932692455.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/161315b6ea63a0---voxelapirosetomuxo.pdfIn PDF document text
    • http://realfootball.gr/userfiles/file/kokemipixukadudonogojuxe.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/wisuxamavekatevofowufela.pdfIn PDF document text
    • http://fsf-vastroad.com/userfiles/file/92550129236.pdfIn PDF document text
    • https://lostfoundglobal.com/userfiles/file/40132076134.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/72a9fbc65263fa3eab3bad387909b0a7/84464042241.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/304ec2f66725bee56b81130d6a6a4db0/10526078757.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/12tun6674a17tve9gjfk50fkt1/72423730776.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/29307232194.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/gubupaxa.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/12993392473.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=endless+learning+academy+mod+apkPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDE 10948 bytes
SHA-256: 18fa22a64a0d2ddb26680f5a09ff32ce4940fbab213fd5cb04e8a3ea8619cd70
font_02_sfnt_off000125f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F9 18880 bytes
SHA-256: cf54df84ff0c33e38149e752dbb9a824075ee7d2bd1386ed60ebb8aa3ddbeccc

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