Malicious PDF — malware analysis report

Static analysis result for SHA-256 149dde90502d1e13…

MALICIOUS

PDF

80.6 KB Created: 2021-09-17 10:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 327ada0d7531021c555c678830fa9645 SHA-1: 29598f132e2ba3c2e00a81df7f8696ef0ff1df3f SHA-256: 149dde90502d1e13890db1736976a3e352fd3cdfd58c464b53eb93989eb79b88
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a link farm, with many URLs pointing to potentially compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://crysiq.ru/uplcv?utm_term=show+cause+order PDF link annotation
    • http://cokhiminhhien.com/media/ftp/file/83553808230.pdfIn PDF document text
    • http://diamant-x.sk/UserFiles/file/winewiwudizuxufoxo.pdfIn PDF document text
    • http://ventensis.lt/public/ckfinder/userfiles/files/ximodetowasogeweda.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/16218105899.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ccbb07e490---9094917681.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/96102799764.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/vukipur.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/89408194054.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/sasixufelafenewil.pdfIn PDF document text
    • https://karapinler.com/calisma2/files/uploads/89533022148.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages/files/tiwebereredugoludevixoxem.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7f51cfa62---96809005323.pdfIn PDF document text
    • https://dhins.com/testingsites/advantage_aviation/assets/media/file/95416740091.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/logavenovuvuj.pdfIn PDF document text
    • http://tatvideo.ru/ckfinder/userfiles/files/66141268800.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/161335e52bc390---59992309428.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/sufimakar.pdfIn PDF document text
    • http://planetamama.ru/files/file/33817847116.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/zirij.pdfIn PDF document text
    • http://locke-3c.tw/uploads/files/202109122025026498.pdfIn PDF document text
    • https://foundationkuzmanov.com/files/10109483682.pdfIn PDF document text
    • https://sydneystudytour.com/accounting/userfiles/file/dugenasipu.pdfIn PDF document text
    • https://www.educationsexuelle-ecole.ch/ck/ckfinder/userfiles/files/fikonadubapoz.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/jexixixawevelow.pdfIn PDF document text
    • 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_off0000d7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CF 17456 bytes
SHA-256: 88a9f3ccce4ffbdfb799ee3f1e3235adb0210e7247d31f91466eeb78c106b7f1
font_01_sfnt_off00010559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10559 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D70 10388 bytes
SHA-256: b0dc133b19be80d4871feff964d3ce338fa42b3de231a0d8269b7d954f2164a0

Open this report in the interactive analyzer, or submit your own file for analysis.