Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd580d4e2d17605…

MALICIOUS

PDF

94.7 KB Created: 2021-06-27 03:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2b1cf4fd5c703f9be9a802f5bf3cc7e2 SHA-1: 8dc4b37d13bc90aecb13d799bc37e96e44954c8c SHA-256: 6bd580d4e2d17605651c86a3739cbcf780a9d051040317f404e97509c3427438
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a significant number of external URIs, many of which are part of a link farm hosted on disposable or compromised domains. The ML classifier strongly indicates malicious intent. The embedded JavaScript likely facilitates the redirection to these external links, which are designed to deceive users into downloading further malicious content or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://allytemp.ru/uplcv?utm_term=fundamentals+of+mosfet+and+igbt+gate+driver+circuits PDF link annotation
    • http://autoscuolepintozzi.it/userfiles/files/18933123924.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/tezapaval.pdfIn PDF document text
    • http://feast.to/upd_file/dujugezogutexumi.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1609e825498127---weremubasu.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16089f19be0f73---32498238827.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/53575592650.pdfIn PDF document text
    • http://manajrgvaaradhi.com/cms-uploads/files/rifurunatalop.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/56412691113.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/magrhfaqborc7je0do0rsq1eom/vasixowu.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/65126746347.pdfIn PDF document text
    • https://alajuusa.eemedia/contents/file/vejuvelagowukolanumuvij.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7bd9cddd9---14815076259.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a4733dd29---nukofijolulafenixuwe.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/knbl7dn8ivblmers6guvnvb2sp/mobof.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d5eaa16ec---90792840535.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/6fp4pdrgbl64skldn13tc4js97/22109136226.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/1hst8mq2nqinu98o7c83ci6k34/nefimakerepexoloduvup.pdfIn PDF document text
    • http://skyrunarser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210609052900961301w4tdd4.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f3bf3f926---domatave.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/8aaf3d4f79ac104490fdfdf14f26494d/nadubitinat.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/12210f57e730d988542de52cae649be8/ponewupumagabemebe.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/97133447560.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.netReferenced by PDF JavaScript
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseReferenced by PDF JavaScript

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C09 11104 bytes
SHA-256: a698e38e506fb2b10adcef2397909e2e637bf1a2d8da57d6426881a49d3371d4
font_01_sfnt_off000125b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DCB 18004 bytes
SHA-256: 56fd2bed930e8cef2ac920cf5535260b4165cdaf41631f5a7cac35c6d1602d45

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