Malicious PDF — malware analysis report

Static analysis result for SHA-256 9718f8f25b22387f…

MALICIOUS

PDF

83.4 KB Created: 2021-09-03 14:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3108813ebb65b2349aa0c0bed44eae0d SHA-1: caba4ae1742d51d2e638eb0e1b8e2ce333cbba13 SHA-256: 9718f8f25b22387f08c5b2e971130a5bea9d604738300eb4ddd52d0c8782a3a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://krisoc.ru/uplcv?utm_term=volumetric+analysis+experiment+pdf PDF link annotation
    • https://geneticapanama.com/userfiles/file/zadudomizerobem.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/13142039284.pdfIn PDF document text
    • https://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/zibufojiboxume.pdfIn PDF document text
    • http://halanmilk.com/upload/files/rilazazabajet.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/2d67b324729b1ec265cd40f8f9b54b91/gujibopenorekuxezaru.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/fumopiwubisemuli.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/ad1f11c2775d9db66c050bd471785332/9953642840.pdfIn PDF document text
    • https://namphuctourist.com/userfiles/file/36156577274.pdfIn PDF document text
    • https://bloc-immo.com/images/76023422118.pdfIn PDF document text
    • http://agriturismolionsfarm.it/userfiles/files/xusotinunasuw.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/85eff22a723e09844f7a27239c81fe8e/barufefenewebapi.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/62781a9853cbfd4e6f2b180f49e5f6ef/berizob.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160afbe8abeeff---24596657335.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/80453949418.pdfIn PDF document text
    • http://sammyuriasproperties.com/userfiles/files/gudexesavinusu.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/sajugevinadesofobe.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/71737645130.pdfIn PDF document text
    • http://vlajamo.cz/images/file/94552346404.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/90c59b4b2b95e0e22a61174e20332405/72665775276.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a14c704df8---nabobixevomakuxe.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609dce0e10a1d---9215747961.pdfIn PDF document text
    • https://www.disbel.es//ckfinder/userfiles/files/83102469976.pdfIn PDF document text
    • http://voijin.com/userfiles/files/vuweponoworozugoz.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/cf3782eeacc80a772dc7f29e738f8595/10240107655.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_off0000dc7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7F 11068 bytes
SHA-256: d174d3b7077731163f61ee4e383cc7c49cf8faf8a4709d3dd3d1b529db403324
font_01_sfnt_off0000f64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64C 19532 bytes
SHA-256: be70a14f8a1f8de6fe9cd8de2ec2824b984a209e3d8c4cd6cc24863e4d4fca7f
font_02_sfnt_off0001281b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1281B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.