Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0f8859ebd069723…

MALICIOUS

PDF

68.9 KB Created: 2021-09-09 23:30:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 78735e71d1e59376a63d83bc3ec64fc4 SHA-1: 207da6c2e156a69f66c5fdc7724c5304ace0aa23 SHA-256: c0f8859ebd0697235ff38a49ad4d4b9395bb184b7747e4f85898769d75cebdd6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a large number of external links, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious URLs, which are designed to host phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • 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://medvor.ru/uplcv?utm_term=bitlife+hacked+ios PDF link annotation
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/dl3drlducq95845v3o3aqimssp/64162493755.pdfIn PDF document text
    • https://biroestarsa.hu/uploads/file/duzudupabokuzogafuk.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/rokukimoxumawopavalirisut.pdfIn PDF document text
    • http://perfect-gallery.com/userfiles/file/77459199026.pdfIn PDF document text
    • http://naphogacomposite.com/upload/files/wazikozilumimarubudumi.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/26937137971.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1612f54b4843c5---46461633857.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136392484dce---kuxejelidax.pdfIn PDF document text
    • http://sov.tranovice.org/webpagebuilder/ckfinder/userfiles/files/bajekizufumekowit.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/xuguj.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/17754771667.pdfIn PDF document text
    • https://sinarlangit1.com/contents/files/gafitafajenugodulal.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/gezitanoniwuzikufif.pdfIn PDF document text
    • http://artospace.com/pics/file/81298656518.pdfIn PDF document text
    • http://marchmont.ru/imgs/file/70202191169.pdfIn PDF document text
    • http://www.rupankar.com/fckimages/file/41032232816.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/6e6b44b9b2fd9cf060ecf528c2b53f1b/31874019157.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/mugupipufikuzab.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/t6471a5e5dfl60nlhecv05blnp/vafurojunubiripodu.pdfIn PDF document text
    • http://branonperformance.com/ckfinder/userfiles/files/19310120916.pdfIn PDF document text
    • http://clingac.es/d/files/nukode.pdfIn PDF document text
    • http://michellenevinracing.com/FCKeditor/file/kadet.pdfIn PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/4496591029.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/somabixorig.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_off0000b0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A8 10512 bytes
SHA-256: 04770cca806d4b10607686ef6baddadbe93488d61b64fffd96b608cfadbdf671
font_01_sfnt_off0000c8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D3 14856 bytes
SHA-256: 6914efc0e72fc7455110a2967bd6e6b9aa264274c4c249cb6114add8cfa65399

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