Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae73b09aa8dfa83…

MALICIOUS

PDF

75.0 KB Created: 2021-09-05 12:22:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8b56aae432587029b82169c76939ebce SHA-1: 7e5f7d36e906766a95b5f5c32df4ba03cd427e77 SHA-256: 0ae73b09aa8dfa83562f7fcdbe817cc845f50c62bcc67a8b004409e4e4529fb4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to compromised WordPress sites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious lure, potentially using embedded JavaScript to facilitate redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://huntic.ru/uplcv?utm_term=meaning+of+public+sector+pdf PDF link annotation
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/p4d71s1sidcrlos436fego6du0/vivapuzemoretijodas.pdfIn PDF document text
    • http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/fozadabinituzu.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff8e172554---petofaxegagereko.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baf12496bee---42609206915.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/mgak3jkug51ul7bau2kb8976cm/kivamipokov.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/c2cffc690449aae0eb75b74ca1361a21/38034415802.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/24602534482.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/3238e5a3e056c66d03b75cdc5802bd3f/86889563560.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/161186a5e91087---38696714472.pdfIn PDF document text
    • http://tykhchem.com/upload/files/foketukutiwarijuxax.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/55307896229.pdfIn PDF document text
    • http://ashioke.com/images/library/File/8259811214.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/24530747976.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/vkqd84f4nhg9vlt30tbbk2f8mn/20508450324.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/27943648361.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0db47e7f4---gidukufa.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/21467808307.pdfIn PDF document text
    • http://naasschoolofmotoring.com/fckeditor/userfiles/file/vigiton.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16098886c71b9b---52849297855.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/14099609289.pdfIn PDF document text
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/84864577073.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/84545853391.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/79248950630.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/d7a570d761591391b0fcda91561f4f02/3185847032.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc37865ea7---zilavalopax.pdfIn PDF document text
    • https://dp-silver.com/userfiles/file/vitinuxukopulatokot.pdfIn PDF document text
    • 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_off0000c0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0EC 11028 bytes
SHA-256: d067b8fbf4212b4cb439e79e5a56df0b8e8d45d5a9ec037a147daab79aaf9592
font_01_sfnt_off0000da45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF257 17228 bytes
SHA-256: bfecd44b984d58bbbbaf1c5085b17d93b54c11087ffe01f4ae0cfbcccbc0ced4

Open this report in the interactive analyzer, or submit your own file for analysis.