Malicious PDF — malware analysis report

Static analysis result for SHA-256 2396c397c0f1d9d4…

MALICIOUS

PDF

88.7 KB Created: 2021-08-06 02:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 127b334b844745378efc965764859ce2 SHA-1: cbf7503a2852bcecd55e2ad4454f043d52a0ef06 SHA-256: 2396c397c0f1d9d4a0b072bb7bd604f9bfd22c197e2ac83383fadf60672e62b4
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 compromised websites or disposable hosting, suggesting a link farm designed to lure users to download content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://asdgolfclubtoscana.com/writable/public/userfiles/file/89089216161.pdf In PDF document text
    • http://lafenicealcamo.it/userfiles/files/67981423482.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/7326367493.pdfIn PDF document text
    • https://sinarwaja.com/account/files/zareza.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/domuti.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/afgine8k37idu4dg1djg9coutf/nemit.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a237243a0b7---gubuduvibakerujoje.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abfc227959f---gezufiborewawomidebisupix.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/5c7f89a4d583f4445a039dc553b62cc2/99321526470.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/safowijokotokosalogexiga.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/1e9778aa94acafe5520fcbbf152147f6/wetinepigipomoxijiraru.pdfIn PDF document text
    • http://cuatudongnhatrang.com/uploads/files/45374799782.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/gelojevukafudalol.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/fafobalanutibutunivow.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/ca585c1dddaa463cfc125082fbdf2435/5153263029.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/b2f30049a941a832cfe74d861b89afb0/zujaseniwakitadi.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160a800c9008d1---gogokeje.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/b5c6da58ee62d787bf3c1a2933b65b5d/supisodil.pdfIn PDF document text
    • http://entiambalaj.com/upload/file/27180217006.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/f98f863931a1ae526b75826ff5fd7a24/tigotozele.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609669f64019c---wuxuranoluzala.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/pefakig.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/3e62e184d3a4f5054bb2b1c35e547af1/wenuzoti.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/1337201187.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=bajirao+mastani+full+hd+movie+download+1080p+openloadPDF 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_off0000f1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E8 17032 bytes
SHA-256: 1c1241f3c68c46364e3dd45adb72e7dcbfcee7a11b1b66cb6a37497ee17c03c8
font_02_sfnt_off00013647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13647 11580 bytes
SHA-256: 16933dbc26b9f8c30337bdb82fd66354c4de2c0957cb3fc6def6180da061dda2