Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9269e2c4bb21a24…

MALICIOUS

PDF

85.5 KB Created: 2021-06-26 22:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 56a66ae17ac76c46a975c0f23150bed7 SHA-1: d86a2501510171ac6faf83a9901768748e5c2903 SHA-256: e9269e2c4bb21a24cbcd6d18d95afa3f5a25d7c5893bb914804da2f4863d65ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, directing users to various URLs, many of which are hosted on compromised websites or disposable domains, increasing the likelihood of a phishing or malware distribution attempt. The presence of numerous links and the use of SEO-related terms in some URLs suggest an effort to attract unsuspecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://firegallery.ru/img/upload/ruxipof.pdf In PDF document text
    • https://steklo-shik.ru/userfiles/file/niwivelole.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723efba20fe---vagub.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d106366b29e796cd58596c10ac611017/wisufemenofotiveme.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16198618708821.pdfIn PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/84269406356.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09f40a31a4---xikebuvabejexesix.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a149bd4074---6053344272.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/64010664152.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f52501cc85---75000940459.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/42261783922.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/7q4j1bstq648vbgme9691abvrg/67745321055.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/tasax.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/41005453316.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/42257975705.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2fdd41ed8---48600513120.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/woxuposigabepugibozuta.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/d9e492d365b0aa16397873641d320e30/wadamawedofozuduvofedaraz.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f95f1bc7ab---81633563035.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7ca5c692c---duxidepikesugefuk.pdfIn PDF document text
    • http://jhsclassof63.com/clients/c/c8/c8cc7cee7579ddcd469b669c0eb172d8/File/71815210570.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/52066932287.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=download+stata+14+freePDF 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_off0000ed6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6A 16804 bytes
SHA-256: 5759c257270136841bacc0b94696408b11371f055bb3f36f620f5e9b14aea877
font_01_sfnt_off000118c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C3 10472 bytes
SHA-256: b2da67b0072eeff2a78174a6cd4e345b4d43e473d0290833718dbcd28b3fdfad
font_02_sfnt_off000130db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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