Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef8968254c8f8d7…

MALICIOUS

PDF

78.1 KB Created: 2021-09-01 21:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 17ec88f342cd63dd867de25f23d0dece SHA-1: 08c7376ee027465569cca33a42bc4d029ac15433 SHA-256: 5ef8968254c8f8d7d8c5986adb961e7f7843de100eef7a004df89828778faece
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS upload storage or disposable hosting. These links form a link farm, likely intended to redirect the user to malicious content or phishing pages. The ML classifier strongly indicated maliciousness, supporting the assessment of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pistant.ru/uplcv?utm_term=what+are+the+coordinates+to+find+diamonds+in+minecraft PDF link annotation
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160850e259ac1b---13835044787.pdfIn PDF document text
    • http://velocimapper.com//webfiles/file/5412161027.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/81102ddbb7c283103720ec7c0bb0e52e/4205728668.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/98190393071.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16077f37fda77e---87955164592.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607208b79491f---53399310746.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16079f52b51c0d---96884984202.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/pogojudatax.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/26a6c75b20dd6593a55f469fb3a392be/68876243219.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/87892362607.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/45281141116.pdfIn PDF document text
    • https://ferest.ro/imagini_ws/kiziju.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210826093550.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/45622431563.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610ce865a8e9b---lurebuburezapire.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/30444988713.pdfIn PDF document text
    • https://wolfgang-photography.com/userfiles/files/polipewifakawologu.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/39897402600.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08178144b6---81248558910.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae43bd5b0d6---52143451666.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/bfa77993832c4ccc8c9f472772bc850d/jakugetowevuvopu.pdfIn PDF document text
    • https://digicpictures.com/downloads/47349519978.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7f23ae0db---88765269239.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/58106517755.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/zozajejisamejelesajapizez.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_off0000cc9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9E 10688 bytes
SHA-256: b575b381a685e3345cc46e0320c87fa97130a4587a48777c1970c54c6fba9dc9
font_01_sfnt_off0000e4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD11 17204 bytes
SHA-256: f942baae8eeedb396be2c5f284dd353c7f570a7acf47a5de7c1c81b62d41b0cc

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