Malicious PDF — malware analysis report

Static analysis result for SHA-256 6149747718f8a24e…

MALICIOUS

PDF

81.1 KB Created: 2021-08-21 11:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cc02fd05960fc552e6a058463064570e SHA-1: f843a11861172855b9eb36eac4e0a08287ecdeac SHA-256: 6149747718f8a24ee5fa56e454070f973faaebf8461c1ebc07196dc06bbe4c16
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The document contains numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting it functions as a link farm to distribute phishing content or further malware. No scripts were extracted, but the presence of many external links indicates a strong intent to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://inwebjor.ru/uplcv?utm_term=ontario+license+plate+lookup+free+online+canada PDF link annotation
    • https://lee-trading.tw/archive/upload/files/jurale.pdfIn PDF document text
    • http://foodsafebox.com/ckfinder/userfiles/files/nuzuzadesitelu.pdfIn PDF document text
    • http://cphs1970.net/clients/877309/File/fefudir.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e9f30f8f4---2586575511.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/11895725863.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/6at01vanqkhhmdsi2t4qj7sln7/12718386945.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/8815605787.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/726a7dc70fcb7ad96106a19e864db42c/64546003184.pdfIn PDF document text
    • http://droneducational.com/admin/userfiles/file/78739367092.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/86872870209.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/renometetaju.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0770efd51---43389155266.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b0b9c5bab---14909627037.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/juxotezomir.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/rupimivugizeduxijine.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/46230227696.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/62136887580.pdfIn PDF document text
    • http://hainfelderteich.at/81612376353.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/xefuwetagakapijuzatageb.pdfIn PDF document text
    • http://banning64reunion.com/clients/a/a7/a71e9339640f4be667ed55590a288245/File/21645025123.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/a8gv62pgo1biafs3q61v7act1m/jutikese.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/b5fe216d5b7f22d15dc9b0a058489415/wuvitowawopepi.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/bubpdjp9v4brrgeqd7l9a0ppno/56801348413.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/66088203392.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_off0000d9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AF 10832 bytes
SHA-256: 552ff589f99f579ba56b25efb91fb419aada29f52618879e82d12aa2e8205c20
font_01_sfnt_off0000f2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEB 16712 bytes
SHA-256: 45ad0c7ff8e34ead80d0d01b368ceed3634771c8f4b75669244f10fe72d61fe2

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