Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d95617e26b19055…

MALICIOUS

PDF

80.4 KB Created: 2021-07-01 23:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 337288a27eb117aef2673f2f06eddc20 SHA-1: 3eec25bcae71261bbf6951b22767b3d05b6f7175 SHA-256: 7d95617e26b19055e38392d71a05c7ce0d515cebd027bed2192315095d2490bb
124 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress sites and other disposable hosting domains, indicating a link farm designed to lead users to malicious content. ClamAV identified this file as Pdf.Phishing.Trojan, further supporting its malicious intent. The primary goal appears to be directing users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4058

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 https://queure.ru/uplcv?utm_term=meaning+of+double+in+c+programming PDF link annotation
    • https://perfecthospital.net/FCKeditor/file/fewololupi.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/6d1b3e5438a94e78a7c2fceab857a824/97560704665.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/32155705338.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b912513f08e---97380405088.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609c71dfe0b01---bisegokizemaralarol.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/7baf2351f3207559ffd5433b55bf16a8/69058198546.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/i2oap5vh7kbfglv3c29mlu7khe/fudujutowufas.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/negekasubiwevaduxizada.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/8967733f0751c63291083e05fa8cf392/41482913050.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/272b333d117a04212a356ee5c4993ce9/zubatibufesafari.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbdc72df3d---61391555931.pdfIn PDF document text
    • https://soechi.com/userfiles/file/10879944834.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/c51f4a14ab2ef2c39f46ed0e302d9efb/77799620707.pdfIn PDF document text
    • http://parentini.it/userfiles/files/nesosopuwofowaledoto.pdfIn PDF document text
    • https://birotex.rs/images/files/pelaxo.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c1fd975b1b9---47004509621.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609548cbc41db---kusagenebun.pdfIn PDF document text
    • https://ventadeterrenosurbanos.com/userfiles/file/58429510947.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0612dd6c9---53296441043.pdfIn PDF document text
    • https://familienarbeit3plus.ch/userfiles/files/genepevabuvoxesajidab.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/87027844560cfc782c8ea6.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/e75be58a00a16a91d918bb6ad3f4d336/27669733983.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/venaleruruneruremijizizu.pdfIn PDF document text
    • 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_off0001106a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106A 10932 bytes
SHA-256: 40ae575b76483a618960c7ac10973c79a003644d1f044d0d8ec5bf9600340498
font_01_sfnt_off00012939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12939 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1