Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9cc4e79619e592…

MALICIOUS

PDF

100.9 KB Created: 2021-07-02 09:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2dc98f8def078ad3dd123857f56e7e92 SHA-1: b4c8b49b50413fa62f75d74bde6533401767ed91 SHA-256: 2c9cc4e79619e5929f99ea0b3f3d734ce6d01b9b6468ed99c2e46de570360e27
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded JavaScript and numerous URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded JavaScript indicates potential for malicious code execution within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://pixomot.ru/uplcv?utm_term=modern+compressible+flow+with+historical+perspective+solutions+manual+pdf PDF link annotation
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7c26533a5---mujevixusibagu.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/lesuvukerenozinasekofu.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16078b072b0a9c---33746862489.pdfIn PDF document text
    • https://fallsplat.se/file/11924939517.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/bexovuxo.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608261826d546---jononatukodakomar.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/88860982894.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/ibtj0bo229lfgarstfsc7b77b8/sabuboregovoj.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/22283558181.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/wuzeri.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/403c75a66d0ab2a5d5c02a2474a5dba0/97753598602.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/ag94f44vb9qjdjncg8kttqmlgq/57874137171.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/c1fffbfb650c27de9041f6d6d4e03067/598343443.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/vegijesubudesosawevezijaj.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d8e7ca9b5---dibetukasedojorikazago.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/sagufisexetamekeserepo.pdfIn PDF document text
    • http://dges.in/userfiles/file/dafogoronup.pdfIn PDF document text
    • https://keluargamimpi2.com/contents//files/vomujerasodejaguzipu.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/g8p1mjhq7shovcig6psur9fdp6/romejumizexabagis.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E1 8540 bytes
SHA-256: b350e2073553e343d0f38555f633e2fef27a9be047f3445493453f15af64a09e
font_01_sfnt_off000120d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D8 11272 bytes
SHA-256: 1311ee8327e3ecf956a2ddfa1797e27c4d57e7d9299a17b83a5a05e0e64a01df
font_02_sfnt_off00013ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AE7 18116 bytes
SHA-256: dbfcb0cabdab5b97809b9055a01d1c13614d410dc93c791ec53da259d3aff3b8
font_03_sfnt_off00016ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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