Malicious PDF — malware analysis report

Static analysis result for SHA-256 9400926748b8c3fd…

MALICIOUS

PDF

74.4 KB Created: 2021-09-02 19:45:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 50e987a8bf26668cc7e15b143aa349de SHA-1: b03bc77ad3dec7afb2095bef4ad0ea113050dc4e SHA-256: 9400926748b8c3fd40cc842234d00dc3d692328c36226b34d9c6aee9432736ff
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable hosting or compromised CMS upload directories, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation of PDF vulnerabilities to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://koreadramatour.com/FileData/ckfinder/files/20210730_FB137A8F5CD85CF5.pdf In PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca26c768d0---86397884003.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/83886327767.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/geduxapojufosakaluvan.pdfIn PDF document text
    • http://jakebenmd.com/clients/0/0e/0eef9d569b11303d075d19626cc6f958/File/kidanuditagegotal.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607e13472c48c---fogazopenafuzalinezi.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098321409620---93651734784.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/60272ea38da4f2dc10a01ebbdcaa75bf/87291295211.pdfIn PDF document text
    • https://vnsteeldetailing.com/UserFiles/files/niwujavo.pdfIn PDF document text
    • http://vejwun.cz/images/61357444336.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/kikad.pdfIn PDF document text
    • http://kientrucphatloc.com/upload/files/34832506875.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/47a2ffd327dcd28b8200c590c8ee4902/wuravenapepemonopa.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/3985fe1060dce13e1dbda982a2aaaf41/kujem.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/pozeg.pdfIn PDF document text
    • http://sushi-belovo.ru/files/67428211963.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/p95p5mpvimqp1cuhve8kd89m4d/55870877611.pdfIn PDF document text
    • https://livres-arts.com/ckfinder/userfiles/files/26209833160.pdfIn PDF document text
    • http://dentherapia.hu/files/file/weromulejupolawipu.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/69612fa8a87a738c3010aa2be6622f68/xabazitudi.pdfIn PDF document text
    • http://grandinspirations.com/clients/75274/File/39325680762.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/tosadelufagelubefefuwi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=yamaha+nmax+155+manualPDF 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_off0000c056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC056 17592 bytes
SHA-256: e482515af21eedeb534dca93304fb3ddff711f788d2d4c83a3ee95a9fdad7d94
font_01_sfnt_off0000ee14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001062b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062B 10036 bytes
SHA-256: 1b336279eadddd2da4ffc615dc622b7b9ad7d449afd2333ccfd185dc59c4838c

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