Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c567a7deac99ca9…

MALICIOUS

PDF

90.7 KB Created: 2021-07-02 02:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b69f23fc9f01c2f2d2378b9d8a393c1f SHA-1: f297a803f05dc9e5e206c56837323564466fc097 SHA-256: 2c567a7deac99ca9bc92dfd73ef733145bd2f4d707fe27e3a79bb8a336552a55
156 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on multiple compromised WordPress sites, suggesting an attempt to direct users to malicious content or downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of numerous links on disposable or compromised hosting reinforces the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d231ddb18---87731775394.pdf In PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/853f76f367425e51a5af845e23f93e1c/95727514135.pdfIn PDF document text
    • http://pestcontroluttara.com/ck/upload/files/83875446683.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/42d8bc162518820e20cb732aec14821a/12995722263.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/a8d1qqsr3ggacpohu21kdggra4/36567468221.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/86710407125.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/farisexikav.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4b6e2d56d---42435698591.pdfIn PDF document text
    • http://macap.nl/app/webroot/files/userfiles/files/bulepozinobakuwig.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/bk0pao6pjko9otk1oev93fbv67/wefuzajug.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b836c420350---21159260852.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/xosaxurogijiretowumebixil.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a364b9076a4---82500230089.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b028c66aa5---44177441178.pdfIn PDF document text
    • http://drive4smilesquebec.ca/clients/f/f5/f58105ca183540932673f5bf18e62671/File/fubasosi.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/71758218759.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/78taip3gc6ctvacu6uqjqqose7/witedokanaserogome.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/sujolezevalodos.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/775ea9d6781de64534af3989d5a534ac/62572505453.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb02a99082f---56043786129.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a35b651ab3---pumagotolene.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/d0a267eaf23d08e9b65188be867d0313/lubabenejonozurobo.pdfIn PDF document text
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/tuwixo.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/1815cf84e3dad9396f784f3f0a39830d/95526048460.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865e18c3b40---mebanupetoxepiwikawe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=driver+booster+full+keyPDF 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_off0000eddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDB 32356 bytes
SHA-256: a029cf1067f8c7f97728ea19b914eb1e762340799808b4ef898c5f47dba65577
font_01_sfnt_off00012c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14429 10456 bytes
SHA-256: a5e688b63c796d561bf4b3f5f0376bae1fd2ae5a57f161424aeee372d3dfbc66