Malicious PDF — malware analysis report

Static analysis result for SHA-256 d787640b25b3ce12…

MALICIOUS

PDF

86.0 KB Created: 2021-09-11 21:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 949a983a33ef15699cd769af726abd08 SHA-1: e6075d240bce30176acd6995e71278d04b73d300 SHA-256: d787640b25b3ce126e234a9c14e9383f7ad60de7f4d1b8469b4d31f5be665f64
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://mangalargalux.com.br/ckfinder/userfiles/files/24595004345.pdf In PDF document text
    • http://findacommodity.com/upload/file/jugexigenopaxapet.pdfIn PDF document text
    • http://smartraoptics.com/fck_filemanager_upload/file/97375997866.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c9c4a08cb---67305373121.pdfIn PDF document text
    • http://dongkoo.com/uploads/editor/files/niwixekapof.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/wulumapifamepoxawevuke.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b43325104---dilupezubuxobivegel.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents/files/tejegepapijopobuve.pdfIn PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/zaropopelomir.pdfIn PDF document text
    • https://nexapos.com/upload/files/21402083454.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/e9af2034fe89e6e2da4d3e5336eca9e4/tozaro.pdfIn PDF document text
    • http://ihanzao.com/userfiles/file/20210903000943_918985476.pdfIn PDF document text
    • http://mathrainbow.com/userfiles/file/kovawipatuxos.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/lb4lh93g3jj43m8pas59uve366/96622024567.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/nafiwixovelinar.pdfIn PDF document text
    • http://labradory.pl/file/26498083700.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612ece0cce4e1---45498526592.pdfIn PDF document text
    • http://runwellconsulting.eu/file/file/kanetirijorikolonivawisub.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/62460680236.pdfIn PDF document text
    • http://imobiliariaimperio.com/files/files/89104578405.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/buvunigazef.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/21742487766.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/85811528899.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=avatar+anime+streamPDF 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_off0000eaee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEE 19004 bytes
SHA-256: 8ad9d48cc37a70b40aee552375d4e029f84fa698689a2a83aaef2796ce10bfbd
font_01_sfnt_off00011bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD9 10152 bytes
SHA-256: 3fbfb5ea4cd693b117006d31e5a270af009de2f2550642de49cfceb7324723ff
font_02_sfnt_off0001328f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1