Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1bcc51d636d7911…

MALICIOUS

PDF

70.2 KB Created: 2021-07-25 22:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 09d3d13e875de483ed74f1a6380a4a69 SHA-1: 54e99f1aaf0670139a4924b3fa68476839512ca8 SHA-256: d1bcc51d636d791100cd81b809ed1794b1605512aaa6137a5db3f05ea9bf2f39
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of numerous distinct hosts and the use of UTM parameters indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7972

Heuristics 5

  • 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
  • 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://jamurgoreng.net/contents//files/39952836264.pdf In PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/e30f7f234c03c9dea8c94edc74117d26/nirenixumidejejuziwine.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/79088929fa0d8a0ee605695774100152/jasaduviwivekowidoxemubel.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094dbc82c56c---87174254216.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae356c3fec---tabaxadosuposa.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076db8723b48---xafuturixipovuraxozu.pdfIn PDF document text
    • https://flyfinz.com/userfiles/files/72264204460.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071230a9bef3---25535581224.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/c5cf8ab44e2b58a6d9ab7b525cb75649/nowivenasawogejovedosigul.pdfIn PDF document text
    • https://maryamghiasi.com/images/upload/files/99673619914.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa67ef6a799---nogizeboridemekifuripuvug.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/15097510868.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/e183be444eefee62c42d7468c8930c47/dufugisojafulatuj.pdfIn PDF document text
    • https://dietmoitangoc68.com/upload/files/lekudiwisopumipepowivi.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/53011052891.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/40268646026.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/4dee1dbf3474de7ec4384606e62fecbb/33977637538.pdfIn PDF document text
    • https://dhesient.com/media/72710982079.pdfIn PDF document text
    • http://studiotecnicolari.it/userfiles/files/70253688186.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9a4c655dd---rafolojipodudokenilagexuf.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/e4576ff24752accaa6584dea91292439/30290564175.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/xikosojokezodib.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c74ac8252f---63209930155.pdfIn PDF document text
    • https://asi-filter.pl/files/file/xomifivizan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=como+calcular+a+%C3%A1rea+de+um+ret%C3%A2nguloPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB0 10952 bytes
SHA-256: 86db5108cf96199564f6644dcccebff08d06326387e593d68b9e50858d7ec935
font_01_sfnt_off00010507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10507 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1