Malicious PDF — malware analysis report

Static analysis result for SHA-256 60688b835ed3ded5…

MALICIOUS

PDF

85.7 KB Created: 2021-07-06 22:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 04d25d2ed99aa68961ba7883c6afe703 SHA-1: ee9a95bb91c3ee91107762b07cd1dc51faa13632 SHA-256: 60688b835ed3ded54cd27f1db4e0def551884d82d47bd48d90ab3ab16b9500ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the nature of the links and the PDF structure suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://mednet.mk/public_html/upload/userfiles/file/34505147513.pdf
    • https://denimder.org/resimler/files/worinowurarofopigimof.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/23k5t6n4dhetit98o2qefr54f4/bezakomojaliguban.pdf
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/6d066a534efd55fd456ffdd58a16bfce/busijo.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/1lnog75lrnbmhlkn0jbvn1c9m4/zepewineboweziwir.pdf
    • http://csc0311.com/userfiles/file/20210616112921_egpspt.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160a2470647db8---xawojoga.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc480ed152---pipixazafaxamipom.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/b1bdb0a3ee3932a9a3356884efcc9ab8/60990146950.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/2d29507cd4ffefbf281b1174ec139b36/totudod.pdf
    • https://lusagroup.mobi/images/website/user/files/foxibelawo.pdf
    • https://rybczewice.pl/userfiles/file/71399006425.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e84618e630---wewidutunagutikexo.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160abb774baf5a---baziwikosugezonubano.pdf
    • http://meskerjager.nl/media/files/58233379005.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/94828d62a223dc8a3bb466f5dc3002c4/2972518375.pdf
    • https://signika.pl/Upload/file/xisipilunadaridofomexupuj.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/5ceblrp60cmic1vrp2un4ttuho/kedeb.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/71e008d34d43b1bc926da51b032e2f28/91610856128.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ce93c4ced---miwuwixem.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/gnug00jah6mvpmegkpqgkmjso1/46680295197.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf5424d087---sadapim.pdf
    • http://matstravel.ru/userfiles/file/3444426732.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=rollercoaster+tycoon+classic+apk+mod
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CB 16792 bytes
font_01_sfnt_off000101dd.bin
943b7654310e152cd527de9c79385d156af6599d95a49ac541f7e1831f043793
pdf-font-stream PDF embedded font (sfnt) at offset 0x101DD 17724 bytes
font_02_sfnt_off0001304d.bin
5819fb09fe9a9cd3f344159d12455c038e38d91b43c14efaca9bbe1a00663a73
pdf-font-stream PDF embedded font (sfnt) at offset 0x1304D 10928 bytes