Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e02abd0506f7bab…

MALICIOUS

PDF

82.2 KB Created: 2021-09-07 14:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 58aeac074ba81120d32327750b177ee6 SHA-1: 375e56976436a886c2587d38d797eb7299a9e7d7 SHA-256: 7e02abd0506f7babc7a7cb3bda0b1bf8cfb077ea668d26c17e01afa4efd38bf6
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised websites, including one hosted on a WordPress upload directory. The presence of numerous links on disposable hosting and the use of UTM parameters suggest an attempt at SEO manipulation or distributing malicious content. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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
  • 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.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609916061f498---54963918743.pdf In PDF document text
    • http://mp-journal.com/media/file/1479141175.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/37717382938.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/2e5f4fb4c6e492d9ff548a754bc2b9b0/webulimajetufureb.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/3344cb1fc951095348ea1f9e7cba0d24/79759696038.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/oud3aj7tjuu2id36m52j4b8dui/davuwinedorixumemaro.pdfIn PDF document text
    • http://gardenofsound.com/userfiles/files/48457514411.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/gjm60dbogbjsblcfmj8ajv8els/79843352950.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/446797510.pdfIn PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/balozu.pdfIn PDF document text
    • http://northcity.rs/slike/files/jusij.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/5qi3fj171rbet9ari3e3i8vmq6/fizorozu.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/43070458001.pdfIn PDF document text
    • http://statewideroofservices.com/clients/b/b8/b825a24af54c157c196cf52173d75bf0/File/kexuxipugevi.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/a9nnfp3s17mkqu1qaiapqpet3c/81802983410.pdfIn PDF document text
    • https://flavio-tonon.it/public/file/mavadavuxemujini.pdfIn PDF document text
    • http://bjeclinic.com/ckfinder/userfiles/files/87799132554.pdfIn PDF document text
    • http://adci.vn/data/upload/file/tovefata.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/49510499121.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/b920718639889fe910e41843e31c1f6b/69845972297.pdfIn PDF document text
    • https://masukpt1.com/contents//files/masuguxoterodojuvura.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a598d4177---79478776309.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/54057831421.pdfIn PDF document text
    • http://dulichgiahy.com/upload/file/jozaxikuxeka.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160a9349a74913---liranezetosi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=manually+install+nvidia+drivers+windows+7PDF 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_off0000de0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF625 10652 bytes
SHA-256: eab61236cfedf8426ab8a8eaf0c5f1d4be1b0782e25b12502bc64d560004c809
font_02_sfnt_off00010ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC5 16900 bytes
SHA-256: 087e0fd8ab4ad31198244154f8e80096370f4c4f952c5e873c6dfcfafb919fa2