Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a5fc48df184c031…

MALICIOUS

PDF

67.9 KB Created: 2021-06-28 22:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 05c1aa2d3807770e86c62ca0a363e454 SHA-1: 150ae4e28bfe590a58bdc14ef71849d5b0a77120 SHA-256: 0a5fc48df184c031f1e0f28c96e14b8cbdf0f8434f8fce89c0f076abd7295b5e
124 Risk Score

Malware Insights

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

This PDF file contains a link farm pointing to numerous compromised websites, identified by heuristics like PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM. ClamAV detection as Pdf.Phishing.Trojan further supports its malicious nature. The primary function appears to be directing users to potentially malicious content hosted on these compromised sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4587

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/00jt0hc3pbmi2su7ls1c1g7ar4/37899803170.pdf In PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/de4kclffputddn9rgf9dkejf4a/1381023494.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/jagikefijobu.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608782aaa99e6---zapevamopaji.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021050402534915.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/kotoret.pdfIn PDF document text
    • http://karunb.com/UpLoads/files/77060238885.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/69da3d6ee9d1cd3a7b57996ed2beb49d/77080456561.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c5767dcecf7---73372848732.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bfae2a6b52d---gepuwagusisemobus.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607882dd36ec7---10254406854.pdfIn PDF document text
    • http://resheto.ru/users_images//fck/file/fokax.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c95172d86c---11539588002.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/d2e48474aea4013a0cf220c9cae97e87/70139132328.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/01b1f05e80e744b7956d5b09eb048d8a/nuviviligumok.pdfIn PDF document text
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/dd0a6068929ed841c0409792cf9c4e35/75484773921.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/nituzofawejanetat.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/74d3bc8086e3e81b18a2e40eeefd49da/47521655680.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075b0cb41056---dinasilojikudabavegoro.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/60ab4c9e4259256da4a4e4ad7e244543/75391141213.pdfIn PDF document text
    • https://seikai.jp/free_images/files/39459119400.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/llpurdsq2h4ljkn5db65t34uru/renibevedonomiwexi.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/luwanufowovorazaniwaduv.pdfIn PDF document text
    • https://anakaygame.com/calisma2/files/uploads/7977115402.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/18196484827.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16099c8970eb7a---88934725792.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=hc+hardwick+antonyms+and+synonyms+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22A 15944 bytes
SHA-256: 69768c701a92724c669a8424498947f66e6b39a645125b0cd1c8780ceb14671d