Malicious PDF — malware analysis report

Static analysis result for SHA-256 fceeca0a57a658ab…

MALICIOUS

PDF

82.2 KB Created: 2021-08-15 02:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 86c49a320c790295f285596b4a4af284 SHA-1: d3cbbfc3cb87509f3a34902ebee3643859c51ada SHA-256: fceeca0a57a658ab5bcfaa28ad9e1ca3683927b090ebf34942f960e319957a30
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS upload storage. The ML classifier strongly indicates maliciousness, and the structure suggests a link farm designed to redirect users to potentially malicious content or for SEO manipulation. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://chcial.ru/uplcv?utm_term=ixl+answers+7th+grade+language+arts+g.3 PDF link annotation
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d111940fb5---42132324596.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a485f8b1538---25183202228.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021060500191273499.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/kg9g6i4net09a4p4g7hceliim6/39114456874.pdfIn PDF document text
    • http://vinmexindia.com/uploads/80167783912.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/nijexijaxavefisapuguz.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/cf933666fc7af9ec3f87e890749e566b/61605870814.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/ad6dv7ef7qg72feal9esvh9d22/43157585740.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c97328ad7---69986768094.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/59017077181.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/4dee54e5176e46d55585f174ac8339d1/65884788343.pdfIn PDF document text
    • http://garagehayashi.com/js/upload/files/gojagagu.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/7039599041.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609328017deb7---77068396423.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/22206801409.pdfIn PDF document text
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/wagovak.pdfIn PDF document text
    • http://dentherapia.hu/files/file/segelef.pdfIn PDF document text
    • https://pixel.bg/img/file/vuzilarezilikagufa.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160734889bad18---winiruzaxogikofipifar.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/wezaviwoxaj.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160ed8e57304db---xoxosozawesujopu.pdfIn PDF document text
    • http://cyclad.org/UserFiles/file/59690105978.pdfIn PDF document text
    • http://pronobile.de/catalog/file/xugadageseb.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/6865356112.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/lixubapakifidaretitopo.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

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_off0000de03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61A 10840 bytes
SHA-256: 5c697207b32a9c5fa5ca2905208b5732fc43671fa8996b9a7c03eae07bc16b86
font_02_sfnt_off00010f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0D 16908 bytes
SHA-256: 7cf76618c8f6ded33014c100db18aa6826fd00bc1f8e6f9406ed34bb35e5940e

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