Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c2d13bd568d8f6…

MALICIOUS

PDF

92.7 KB Created: 2021-09-06 12:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7c73ef4a5c1d405a8ec9217da6b0be77 SHA-1: b5569662b0be8a38399aa8dad97f2a26eaa9c2e1 SHA-256: c6c2d13bd568d8f6f4029fcfec933bba08d8d739a6fb3902f3bd78de1ed7b2e8
156 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm. Numerous external URLs are embedded, many pointing to compromised CMS upload directories or disposable hosting, suggesting an attempt to lure users to malicious sites. The document body is heavily obfuscated and unreadable, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 https://huntic.ru/uplcv?utm_term=grama+sachivalayam+engineering+assistant+syllabus+pdf PDF link annotation
    • http://montesantangelo.it/files/files/63040705447.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/dapavatakujimim.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9599af2788---zojike.pdfIn PDF document text
    • http://abpaluso.com/upload/file/muloxinib.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/16646940361.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/zivisati.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/57545723042.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085269d5a4de---baliko.pdfIn PDF document text
    • https://mollis.rs//files/88292940719.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/2e94a8ef2704905dcb1ad17ba60900d4/69578963990.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/zumarixakemon.pdfIn PDF document text
    • http://formel1vermietung.de/userfiles/file/bebum.pdfIn PDF document text
    • http://unionzglobal.com/ckupload/files/48668033262.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/6bc6704f1ada51540076227857df1568/busudofugezi.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/68167827410.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/84676194446.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/zufarenafurofugemawuzad1621136709.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/218d951f68b07cb0cdf4f4f697034b7e/bejobi.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f12f6da2f4---xigusobefetuxowivesaruge.pdfIn PDF document text
    • http://pettwayfamilyreunion.com/clients/39389/File/kuvujudisana.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/mojuvevafudazi.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878331803b7---vatasu.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa54618ce6---64152581790.pdfIn PDF document text
    • http://kientrucsangtrong.com/plus/files/fedugopu.pdfIn PDF document text
    • http://forresterfamilyreunion.com/clients/c/cc/cc72bfd2512333311cc1ef5a4fdef90f/File/zalowazu.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/32daf40ca925296c416042b06f57b8e5/jusixulariku.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_off00010297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10297 18068 bytes
SHA-256: 3c6703f3e8a12694162be6ed8b5f226072f0446165b1cb16af3ffd08156719fe
font_01_sfnt_off0001320c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1320C 11408 bytes
SHA-256: a4bc7e1eb96a7a7afc0a3690d8fa457122b1cd51f08180cbc5e3acc9a8b7c845
font_02_sfnt_off00014c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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