Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d17e348e7758bfb…

MALICIOUS

PDF

82.5 KB Created: 2021-09-09 00:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 952eca59f3968af11600e9ee11c08451 SHA-1: 8d8949a92bd22f57ee3d50b883f67956f8e5ca69 SHA-256: 1d17e348e7758bfbba0576be0769a717593830627a09621e8e7d9ce207f52521
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, indicating a potential for malicious execution. The document also exhibits characteristics of a link farm, with numerous external URIs pointing to various domains, suggesting an attempt to redirect users to potentially harmful content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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 http://realfootball.gr/userfiles/file/99285508055.pdf In PDF document text
    • http://skyrun-arser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210901130932617389greu5h.pdfIn PDF document text
    • http://jobcred.com/rk/jobcred/uploads/image/file/mokimibakuvebuxe.pdfIn PDF document text
    • https://freebcard.com/ckfinder/userfiles/files/75451238315.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/8d2aeb28dc3b32394a5763c83ec4d895/sexoxerimuz.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132486ff2a5c---sokenedipetek.pdfIn PDF document text
    • http://reyazahmad.bscsaoner.in/ckfinder/userfiles/files/62005876450.pdfIn PDF document text
    • https://testgit.begurholidays.com/uploads/userfiles/files/26214203689.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/67444101238.pdfIn PDF document text
    • https://pmms-online.com/assets/file/lurujifukilunotuvexaz.pdfIn PDF document text
    • https://saglamahsapkutu.com/img/editor/image/file/75973574364.pdfIn PDF document text
    • http://dxline.eu/userfiles/file/86929025422.pdfIn PDF document text
    • https://fontan-montag.ru/img/upload/5787762153.pdfIn PDF document text
    • https://agrando.cz/files/file/rigadeju.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202109060000184032.pdfIn PDF document text
    • http://tiszaladany.hu/upload/file/13432095155.pdfIn PDF document text
    • http://mcserpenti.com/userfiles/file/64033052470.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/60507578128.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210905133303.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/14818931411.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/madenojadipovowisodawe.pdfIn PDF document text
    • http://abcgsgeds.friendship-match.com/upload/files/63998164828.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/narobofafoxiselibusa.pdfIn PDF document text
    • https://danielfelber.ch/userfiles/file/67827866939.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=war+telugu+movie+fullPDF 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_off0000ddf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60A 18016 bytes
SHA-256: 97ee2ca182f0c4ea402980702245afefe78d34b2619f3e681cc8c05ead13049e
font_02_sfnt_off000124c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C6 10444 bytes
SHA-256: 31af1a6b684957bf468aa6f2e9aa633390f9e36d44c129f87efdab6cb731d4d4