Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2e1ae2d0aee613…

MALICIOUS

PDF

88.7 KB Created: 2021-09-06 11:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ffbbb4fbf913dd7448077d578a298e5c SHA-1: 2a498d75d6f6373ba4e404d107b82716a27ec0f3 SHA-256: 9d2e1ae2d0aee613fe9b1c8c8d4ced6e28ab91adfb53259d0066cb5544af38d5
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, pointing to multiple compromised WordPress upload directories and disposable hosting sites. These links likely serve as a distribution point for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160ba848eca532---23969362703.pdf In PDF document text
    • http://bjbtrh.com/files/pic/file/19592307619.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c929e238f43---galonegibajudesu.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/69064185268.pdfIn PDF document text
    • https://domilot.com/uploader/files/vavatarisuwete.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160830159e76c9---buduxufopujixuv.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/a0446140b13051913b5fdabdb933a1a1/tobasajipurirubewu.pdfIn PDF document text
    • http://studiofelician.com/userfiles/files/58579744068.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/19764439941.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16128c7a46b92e---wunubevuzogonaxa.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8e903670a---80943909376.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/16294ddc29ff90f096c00f57ef1e8b71/69397384546.pdfIn PDF document text
    • http://msiutilities.biz/documents/36513538648.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/jexawasevobeduz.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2943f93d10---tapumawusijujevojuwadig.pdfIn PDF document text
    • https://tpijobportal.com/ckeditor/ckfinder/userfiles/files/joponeboz.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/50247821796.pdfIn PDF document text
    • http://livestocktool.com/d/files/26217581452.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/84129978197.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a36686898b---wedupuwadinezewa.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/aea3cdec19a41b267d4e7b55c0cde112/jewojozatikujamuwola.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/ludasuwixep.pdfIn PDF document text
    • http://blossomtour.net/FileData/ckfinder/files/20210821_AEC3284069B7FD61.pdfIn PDF document text
    • http://cke.hk/userfiles/8271833312.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=commas+and+coordinating+adjectives+worksheet+answersPDF 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_off0000f2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DA 11176 bytes
SHA-256: d3b2871fb52ba2f9a5ce79caab9f0e57a9ce23d04a175d75f109e52da46a4b31
font_01_sfnt_off00010cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124BD 18900 bytes
SHA-256: 2152c1bd72a8327b22ab9e3737c0086c5f3eacb342c739a8cfde0cbac7e87cd8