Malicious PDF — malware analysis report

Static analysis result for SHA-256 96fcffc62319aabc…

MALICIOUS

PDF

71.4 KB Created: 2021-09-01 10:50:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a0da9099aa02eb936345cebcc8452d91 SHA-1: 8ae81a747a87ac9a0bda82c06e926e7b9d812b97 SHA-256: 96fcffc62319aabc5b1da25cd6a1d12553d77cdc4a3afc40f92ea1ae38098a4a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. The document is image-based, typical of a screenshot lure designed to prompt user interaction with embedded links. Several URLs point to compromised CMS upload directories, suggesting a pattern of hosting malicious files on vulnerable websites. An embedded JavaScript stream was also detected, likely used to facilitate the redirection or download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 71 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/1e66aa1a13830b2c01c0b5e71b766e65/zafitetokagovovisobowu.pdf In PDF document text
    • http://sourceit.ke/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/56991028336.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/37778838678.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/73037859214.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/a5664ac66d31c85eeacd7315207da1f4/borofejegizinowa.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de9cab820b5---53983096837.pdfIn PDF document text
    • http://canadianartistic.com/userfiles/file/78655757062.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/b3t6gmgh6kp9524nrh5nshm9c6/pawepotodud.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/e19e7b9140f10a0fd3755457527c0b3f/dowufavasiboromezovirux.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160e8aaad46807---nolikefus.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ee0348cc79---jakewoxulonojilujif.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/10077961581.pdfIn PDF document text
    • https://chachachat.info/js/ckfinder/userfiles/files/monepinigewafari.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/pebema.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/defawijaduw.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/jiloto.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202106031100391894.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/9c4321cafe60664c506f20c664d48254/jibibazixopaxibosa.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/161072c0c17cb5---16364608657.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/e3d853dea1168a38b7557b10e08533c7/zawakedanel.pdfIn PDF document text
    • http://asfalon.com/__files/file/bizopiwivezaxaru.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a4327bca543---rolekekegovunumigis.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/84902df1926a14a1ed24e914bbc2b026/67047146413.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/36708320510.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2bfed6056---16918476492.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=android+not+downloading+pdfPDF 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_off0000bc3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC3C 10440 bytes
SHA-256: edb669dd23ca4b48dce5e79a93bfd57658022eef7475c91edc57de8c631fb2fa
font_01_sfnt_off0000d3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ebe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE8 14060 bytes
SHA-256: 6d54f4dafcbcce216651e3333c52c06751720c414c50e25b8497aab71672b8bd

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