Malicious PDF — malware analysis report

Static analysis result for SHA-256 699a2c85039ac372…

MALICIOUS

PDF

77.2 KB Created: 2021-09-04 06:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5b61ed5d54cb4b194896de30c9ad00f7 SHA-1: afd07c7845cd39f2485581c311a196cf48bb8a1d SHA-256: 699a2c85039ac372889be49f75430368f6ca4e40dbe5ff63f6710ae12d35e0f2
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting, suggesting a link farm designed to lure users to malicious sites. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3e3ad36b8---2623564675.pdf In PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/89750621986.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160daeee9e4a4a---27736138876.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/88293314903.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/5718544477.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607750c15e212---zefakomepivan.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160724a227f29a---98193529890.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/dezuxuwimazufo.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16088559ea6e14---burerutixaf.pdfIn PDF document text
    • https://samsungklimalar.com/upload/ckfinder/files/42132110269.pdfIn PDF document text
    • http://taiwanquinoafamily.com/shopadmin/upload/files/26908066992.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ae096cc88---39775864108.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/42842824353.pdfIn PDF document text
    • http://studiopiergentili.it/userfiles/files/zinugojod.pdfIn PDF document text
    • https://congchung7.com/upload/file/78190272617.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/guwosaxim.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/78792611893.pdfIn PDF document text
    • http://aj-freight.com/ckfinder/userfiles/files/pezopod.pdfIn PDF document text
    • http://alhs1973.com/clients/64426/File/butidofejitikegekawo.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca79f51937---xataviridilit.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/kofirulitigitijipad.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079a266db9a6---dulonosajujasixo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=mercruiser+service+manual+31+pdfPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/e48b22be6727fbaa30432ebc9d8ef56e/53594371063.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_off0000cb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE325 16732 bytes
SHA-256: 5942ff031505b26178dd4658544c1a3e20a30cb397ed597f41c39b7250b81900
font_02_sfnt_off00010e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E39 10944 bytes
SHA-256: 02a1009b719efb637ac56b2eaebfd0cf27baa38a9d6d582692992dc3fb6e8bb6

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