Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dda46502bdabb39…

MALICIOUS

PDF

93.6 KB Created: 2021-08-13 16:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 2144cca19b50f04478ad8eee81713ba5 SHA-1: 313042c04e29b82cad44799f5ea49f02daf41241 SHA-256: 0dda46502bdabb3922c5bc7d7031ab50f671d09670cfaeaa3e2997d3202af034
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with multiple URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160b52c2ecc917---sozolakevumetuj.pdf In PDF document text
    • http://ya-ke.cn/admin/upload/71352795933.pdfIn PDF document text
    • https://dobski.pl/userfiles/file/78704080379.pdfIn PDF document text
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/nafonukozi.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/78665237686.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/33c6cc3abf6d66d3c0d4c4b34708c47f/42403594042.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/guliv.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e13d0ac5c63---zidoravonogidona.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/vukixuliwiseji.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/68009458149.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105190419185875.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/dfa5b785edc768baa96e0704b0d4fda6/rexunugewuxodetezi.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/disatujuto.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/34103205802.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102b534a523e---ruzevufigom.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d9c5199be---nugupuda.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/mhvjclktj6bevr3t5g1iv4qdd6/rogezawod.pdfIn PDF document text
    • https://laptoptranganh.com/data/dulieu/files/21374068702.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/mupogojuwafivotasetusar.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088074b1d9a8---kolerivoradotemapetalur.pdfIn PDF document text
    • http://china-zzld.com/uploadfile/file///2021072805264883.pdfIn PDF document text
    • https://stopserv.ru/files/file/lesomi.pdfIn PDF document text
    • http://wallsfamily1912.com/clients/876683/File/8877571336.pdfIn PDF document text
    • https://frontivo.ro/userfiles/file/57804174091.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+make+moonshine+at+homePDF 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_off00010a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8C 10396 bytes
SHA-256: eb20e25691aa3463f096c0b1296f0407ba45989987662c800c25d64990e27290
font_01_sfnt_off000121e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E6 17780 bytes
SHA-256: 3338c9b9a7b060f81af523214adfb2129ab206562eb6dc01b0f44516322992ea
font_02_sfnt_off0001509e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1509E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1