Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a07ce24b9882a04…

MALICIOUS

PDF

94.6 KB Created: 2021-06-27 13:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1f78769005209aa6a67f26fcb12d52d8 SHA-1: 57e0c81a32908208dba8ab66a53970913b62c5be SHA-256: 4a07ce24b9882a047ba7b456704ed632b5b5bf43546635030ab180ffea5a512e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to phishing or malware sites. The presence of a 'download button' heuristic further supports the lure-based nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/435e02cedcbb955ebb4e61e4fce399da/23839033259.pdf In PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff139be180---lebetobanofen.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abf8883830c---87975873803.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/4516842695.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/29963773962.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba8490cefca---17600774493.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/14163282452.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608446e59c725---61454593832.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/6ea76ffd064a2814904c1376a1e18e60/97334134847.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/mazotuveniwekad.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/817ab521d1569d8b8fdff70dbd45a394/xaxadexaluredamiw.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/561ac195ec18f381747cee2d5fa0d9c5/komomukekewafifafifimo.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afdd8d77e8e---57515430753.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099b0f21d825---tutopokinanikasenape.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/u8jq60r5hmb59gndavgk32rlq5/rozezododopiveb.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/a3a8d956f72c5a8ccc86c9e131f9dc38/95413142281.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160974dab59077---77173926299.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/panokutukudoworaratal.pdfIn PDF document text
    • http://alliance-vietnam.com/upload/files/nodanibizulexezozopali.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/51090105806.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/b4f93cb50a02cfb46972305efb2f4cc6/reradibemuroregimo.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/3e355cbcf4d127f632924e9bc81f0962/begexopen.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b35f42941---26404727912.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=combine+multiple+sheets+into+one+sheet+excel+vbaPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000124dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DD 10976 bytes
SHA-256: d90c0058a724aaa8a0705503411f206efa27142546a9dab35c7c096200d92726
font_02_sfnt_off00013dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DFF 18060 bytes
SHA-256: c05025610588188fba3e94f2f347336db8ad2903b24de9b3b5531c1e6322579e

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