Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e5d31f4508afae…

MALICIOUS

PDF

90.6 KB Created: 2021-08-01 14:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ef4ce6f164e959d293a6b054c6dcd69e SHA-1: b63729034c9fde5aa065daacfa5a57b1cb333b0b SHA-256: 65e5d31f4508afaef3ecc52b9270d42a41b414a659671efe75e204a5b8e972f5
164 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to websites hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a 'download' button lure reinforces the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • 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://aarogyamedico.com/userfiles/file/69069971062.pdf In PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/6b80c24dcfe4d78b0b0cf35fb80008d2/xugonexadagutudog.pdfIn PDF document text
    • https://rent-1.es/ckfinder/userfiles/files/34636384956.pdfIn PDF document text
    • https://wecareprogram.org/images/file/59812909223.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/78jdfhfd632dqf35vrpdt86kf9/98662276669.pdfIn PDF document text
    • http://monktonlionsclubkidscamp.com/clients/9/99/99b8b5517e5fb663501b7ee5137ebf55/File/xeterif.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/pebapubotekobizok.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609486295b9fc---47063371764.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/basozuweb.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/196b721bb6fabb17dcbb4092ee46ee6d/15421497012.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c94cac8c829---widamupadibi.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/22784690730.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1610618450497a---94390086252.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/44614997437.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/lnqk18vhandovtm14kiqf6ojvu/79257603097.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/hmofvau2mqjgantq9vdp2hcbcb/talutafujeduxa.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/jlki6io1ajkro25bgjhedop8h7/berimibunesebaganav.pdfIn PDF document text
    • http://zonwering-nederland.nl/ckfinder/userfiles/files/68420925350.pdfIn PDF document text
    • http://myucpb.net/userfiles/file/rifejurebezudedi.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/22294775352.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16072f4068582a---24166882802.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/51945307779.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/b3e23bcb465689ad88a2e61c15e85274/puwesimivo.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b02066a871d---wediwusoxagijal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=new+english+file+intermediate+workbook+pdf+descargar+gratisPDF 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_off0000ed8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8B 23016 bytes
SHA-256: 391bbe1af2a9dc1ccb3a5f2208dec0eedc96ac00e3a5633a45d7c8eadf2a5061
font_01_sfnt_off00012754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12754 11364 bytes
SHA-256: 0e8a167cbdab0ccad323cf2e10db9ba24752249c36231883afa30d4bf639d87e
font_02_sfnt_off0001417e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1417E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1