Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d7dda7788cbb2d…

MALICIOUS

PDF

94.7 KB Created: 2021-06-26 10:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 70e907582b61b48a3d5ac3497c54dc45 SHA-1: a77e0b7ab1ac18f5e1749b1953c901923aa27c80 SHA-256: 96d7dda7788cbb2d0675122d9f1497c153958e63f73cd22e85b8a86ae45095e5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress upload storage and other potentially malicious sites. These links are likely intended to redirect users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/198b5712a0ea82aae57ad42fb2551dd9/65834517595.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/fvkiicr1ioi7i482uk4ti9h11n/nufavewawibeganodi.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c1sc11dgjbv49ffq01rg5pqb27/81834507304.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c12988ef0d---kopuremeg.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/s3fp2o8hh72ggjl0o3f0o5o3e6/zemoxutamodogel.pdf
    • https://abeess.com/userfiles/file/nipaxujogakozak.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d36b9888efe---75617905360.pdf
    • http://hnysft.com/d/files/zupifokelevevejusefagejeb.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a33b7707b3---rasawaxewaredufa.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/347bdc71e363dbf822526f67b503b2a3/36830296743.pdf
    • http://palyavalaszto.hu/teszt/upload/file/79291919338.pdf
    • http://artecgroupservices.com/imagenes/file/losipunojoripo.pdf
    • https://nhatngudongkinh.com/upload/ckupload/files/55242450458.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef699b4308---guwebo.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/ba71c9054535e15adcb0bc4d58240d63/66651837962.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c64c65fe0---pasiziz.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/bc0614e8ce7faf8abff28692bf60ac9a/5287893351.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/56458624bbb9a85a7f7f252d3498e03d/kebusog.pdf
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/fewabulimejafet.pdf
    • http://vyveva.eu/UserFiles/File/sekuvumogowuwageneginoses.pdf
    • http://angelcabrera.com/FCKfiles/file/setajibijododijulo.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607132af6ce2f---98730080116.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/e1nudnhsug3li2rigppiirjstd/vawozaro.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=arithmetic+sequence+with+variables
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0351e0a85---90425085382.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f482.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF482 16792 bytes
font_01_sfnt_off00010c99.bin
a6b3957de080b0cfa712a54a41afe82c2d687fda5b35252a70f0eb1dec8e606e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C99 10892 bytes
font_02_sfnt_off000125b0.bin
325c5f5cda05429ae92d15c23118ca1b8712e485108c584e1e30b0ff615913b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125B0 16084 bytes
font_03_sfnt_off00013ad8.bin
4954f0fdae0dfe428fc0c811a1bda2f37cd7fc495f23a2e14bd7bfc5c9945585		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AD8 18976 bytes

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