Malicious PDF — malware analysis report

Static analysis result for SHA-256 03c2000c7e0e30ac…

MALICIOUS

PDF

74.7 KB Created: 2021-09-06 15:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e5f235bf4de5feae87965763b59c9702 SHA-1: a8d6cbd4134e8ca3654085a90cd287f1e1fde917 SHA-256: 03c2000c7e0e30ac0c18fc73a85854e7589d42f0f0e30d470cbe3ce9e435b7cd
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with multiple URLs pointing to potentially compromised CMS upload directories and disposable hosting. The embedded URLs suggest an attempt to direct users to external malicious sites, likely for phishing or SEO abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/c77601794b88c4b4a7677242b357653d/19430370701.pdf In PDF document text
    • http://meble-tk.pl/userfiles/file/59865565395.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/varuni.pdfIn PDF document text
    • https://bocrangsuthammy.vn/upload/files/larofitopa.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9a43aa0fb---57482299364.pdfIn PDF document text
    • http://etre-belle.su/images/file/92286875887.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/fevodegixozugefuzuraroj.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/99350162510.pdfIn PDF document text
    • https://www.adoz.cz/ckfinder/userfiles/files/43079221007.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/e7e8f74c0a5d05ff0f28c4356b4a2c3d/pegulamipizobuxafozig.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/94eae45a5bb875702937fbc82fe6f63b/93998607127.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/jamowamodikir.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/bms82ame6nsgrqk2h67drjbjlv/xufuduruwokabukaxom.pdfIn PDF document text
    • http://dvif.fr/userfiles/file/zunisaguborebaxogujanena.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/1topdullv6f5vh67g4m16dm29l/zipoparakibub.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ed195fde1---10959722731.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/16846886166.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/qv8vbrn6bbeoksjq6t3ga4mk0p/pezitadakaseridiror.pdfIn PDF document text
    • http://www.alborada.es/ckfinder/userfiles/files/gutifumapemov.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/300022498615.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/7e11f7313be6b834fd8798662e353df2/donejizemasurisikil.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b9be1c49749---nunazamadokavaleba.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/bufeka.pdfIn PDF document text
    • http://nutrizionisti.eu/public/thread/risorse/file/1669383803.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3882003bf---pilupivasesixoperuwowojeb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=flask+sqlalchemy+documentation+pdfPDF 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_off0000be5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE5E 17076 bytes
SHA-256: a962be93fc455e2dc3d66541f813f714c74067e33e30dd4d6b3d05e5a6732578
font_01_sfnt_off0000eb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001031f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031F 11212 bytes
SHA-256: a29e9bff529830d2fb0e04144b112feaa0bc1d70312ecb5d8d0c564db998c6a0