Malicious PDF — malware analysis report

Static analysis result for SHA-256 da3a5719caf9c7c2…

MALICIOUS

PDF

81.3 KB Created: 2021-09-06 14:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 94671492d267706ef0c6d92c757be5c0 SHA-1: c61dea0be110772f1717ea46f70a590083df9d53 SHA-256: da3a5719caf9c7c23b6d7f865f4cf805ef2e38c6bdd8a9c5edd3e02951df7425
96 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS upload directories. This suggests the document is designed to redirect users to potentially malicious or SEO-manipulated content. The ML classifier strongly indicated maliciousness, and the presence of multiple external links supports a phishing or redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 5

  • 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://hanedantoptan.com/upload/files/65434230424.pdf In PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/bab9c77c8c3682196f376bb5fcee4052/kunitubosawutul.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/ur28av9dij0aarfd6nk2gj9r4v/juvedulowo.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/42833028409.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/13100573511.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/4822380376.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/rowaf.pdfIn PDF document text
    • http://sshs61.com/clients/6/60/60e739d5a8cf4a6710e4f064fd99417d/File/wimonogarasuwuxasadexex.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/857e770f81bc4b929af912b28e0d6557/4937224070.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/demabenibamakufeka.pdfIn PDF document text
    • http://palami.by/images/file/19191927382.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/0eed8eefde7a416b6ee54f2541805cea/90281565758.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021082105154467.pdfIn PDF document text
    • https://jamuiboe.com/webroot/upload_media/penimitufuvutajuzesilamu.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/sazizipovuroroxatasofuv.pdfIn PDF document text
    • http://wahluenfty.com/userfiles/73327834104.pdfIn PDF document text
    • http://edv-denk.com/userfiles/file/53583761121.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/41024076734.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/wokabajozijesixiz.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/vakomekufawulojotejigigow.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b2d7c8a54---71931690778.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e0fdf05c66a---povebupugijazad.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f3fa6b7f6---jirubibibizifezerurape.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/34470174087.pdfIn PDF document text
    • http://theleadershipworks.com/PO2/UPFILE/userfiles/files/68489670516.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=irrigation+meaning+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

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_off0000dc6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47E 16780 bytes
SHA-256: 325a64af4780ff50516fb0bff3686656c33ef8ca0cc47b20f37e24bf778caae2
font_02_sfnt_off00012016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12016 10576 bytes
SHA-256: 60aa469a3a00a9e1ea6f32decbc6102da2501388be5c43ccb67ff1da61e17782

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