Malicious PDF — malware analysis report

Static analysis result for SHA-256 095d1a8e53d8c8cd…

MALICIOUS

PDF

75.1 KB Created: 2021-09-07 04:08:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f4a043c4c2af09de8b9cb71ca623bad5 SHA-1: e60b5b2db4a212ff2f0dedfc550b8d63538dab7d SHA-256: 095d1a8e53d8c8cd10a21213aff8062c7483d7790f8014a10c2eefff96a4a118
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to potentially compromised WordPress sites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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://synerhu.ru/uplcv?utm_term=plockmatic+bm+60+manual PDF link annotation
    • http://amoy-art.com/Upload/file/zoxarasetugi.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/35927528810.pdfIn PDF document text
    • http://drprdesaihospital.com/uploads/judaz.pdfIn PDF document text
    • http://d4sontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/3997795819.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/56505203829.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/75140561914.pdfIn PDF document text
    • https://abeess.com/userfiles/file/21355402074.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1610b8a678b1f3---maxarukipi.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/fepogimofo.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/zulilagomisisa.pdfIn PDF document text
    • https://www.bramfordgc.co.uk/ckfinder/userfiles/files/92890808524.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f9526c574---korezofazam.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/janitinuzijobage.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/1fd00cf1e5d6b959506963697e0b3c28/99467480995.pdfIn PDF document text
    • http://wieswioska.pl/userfiles/file/91192204327.pdfIn PDF document text
    • http://3dsami.org/uploadfilefiles/zubakixapar.pdfIn PDF document text
    • http://wgadget.com/file_media/file_image/file/5972024483.pdfIn PDF document text
    • http://npas.ru/pic/file/lelabokemokisofememisaze.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16094dc1635df7---wifozido.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/vuvotanewosekozedewof.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/8c5fcd0a11daf97237d1985def8e0a6f/80078177799.pdfIn PDF document text
    • https://tsafar.ir/basefile/tsafarir/files/gilumubemew.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/wokijabopajik.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aafc2fe6bc5---zejikinonenodubuwojob.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160b818da288d0---pigazasopi.pdfIn PDF document text
    • https://www.willmarareachamber.com/ckfinder/userfiles/files/jisijudafimaselo.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/novepiwiginowef.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_off0000c2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2FC 16556 bytes
SHA-256: 660a9f5a2305981a1f5639c392eb2b31ae6183a17edb7941b86b8b8fc178ef1d
font_01_sfnt_off0000ee0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10626 10616 bytes
SHA-256: e8bfbd2abfcdbc6935ee7f84e08298e57ccdcd79a2fd81bc6175aa03f9db4a5d

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