Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c00d0ba41f7cbcb…

MALICIOUS

PDF

87.2 KB Created: 2021-06-29 19:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 0c8dd344033445f5b7a54a1fe86a764a SHA-1: b35accfa8d7939216d0353817a576541038157f6 SHA-256: 1c00d0ba41f7cbcbf2b65b5fe7f918782419fa49f2d50102c121fb67f91cb75a
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to distribute malicious content or manipulate search engine results. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly indicates maliciousness. The primary attack pattern involves directing users to external, potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://legalinet.eu/userfiles/files/rogidep.pdf In PDF document text
    • http://splogservice.ru/content/file/sosemevetiremadujewuzizip.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/80583840217.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1ad681eff---dopijolujumozebewonokeme.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/walafatax.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/875b3a2244c6776e0d9af29e3f34989e/66156708276.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/89f86e2e2be33c60f67c59bbc947c82a/63542301235.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861ff352802---78710319633.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/268f60e13d423f7ab3cf1e98b5a6944f/fuvotakofepupevofadikebix.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160873f9e56667---2348431183.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/0a95d89e449e2fee8814da2b6ec755c9/79192379630.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/83518918975.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/84921974937.pdfIn PDF document text
    • http://lakesideterracecondo.com/clients/41361/File/88592393844.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085497ddf1cd---mibapinutefoxinakebisev.pdfIn PDF document text
    • http://studiogiovannone.com/userfiles/files/tanolilisokavug.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd8a56df4a---wegepitutu.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0c5b40f14---64685411365.pdfIn PDF document text
    • http://jamessham.com/admin/usercontent/file/43646949639.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a18764a66ff---vawalupomamubunuxasuk.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/tmk2s6dnltvh0t9tp0ejl5m0ni/93057109181.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/10480537649.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/ef33688beb38ccdfb6778cff739f4597/50929941676.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/11691953592.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=darrell%27s+to+goPDF 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_off0000f2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACF 17728 bytes
SHA-256: 8a2c9078c82856e2dcd3dc3d57d11129153c14bb5f248ae2f9ab2a0c927200e6
font_02_sfnt_off000138b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138B5 10124 bytes
SHA-256: 25c51320d76530c65fe8076451328c12b7d57a88cc5662ea970796723007db79

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