Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9cf840388bbfe2b…

MALICIOUS

PDF

79.4 KB Created: 2021-07-09 00:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 09d110fb59795ee20a35ce7c9b66217c SHA-1: 176b5f689e0385a393cd8f0e0c450cdad0e58002 SHA-256: f9cf840388bbfe2bb2c893bf5275c8ca5a680ad4d4eb3e5aaf911142be1f1751
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the nature of the links and the 'link farm' heuristic indicate a likely phishing or malware distribution attempt, potentially leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a637e3b35---14026387592.pdf In PDF document text
    • https://szud94.hu/img/sajatfile/files/lagane.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a5a4c230c---14083158804.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16097bab9aa61d---lufegeg.pdfIn PDF document text
    • http://valeneighbors.com/userimages/30070682235.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/76850869164.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/39db84c8ea1514f30c8848d3627b3d03/wozizapofotedarij.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/03nm8qmj3mfphpijb1isvs8t84/lituvozufodozexetipum.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/65002119237.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab97e2c08e2---736109515.pdfIn PDF document text
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/jepifolafutuxikifazarus.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16099bf0b1e8e1---13002773066.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/7g2qsscvicu9im1k3n93l2gdbi/manenemijidixavefiwune.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/46398501ca75f43dc9d827e186780463/37598976255.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/9121af2c50321676b463da57c85e387a/dusozanimidigojewedasop.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/lumigivizipe.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/17394977738.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/511ff32d6cf8f835ad5e67e231843e8e/21444818437.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/82518474062.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/siputopizi.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/nusubad.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/dozutuxulowebosuwapefolas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=six+letter+words+that+end+in+oPDF 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_off0000d2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B0 17448 bytes
SHA-256: 17c2310ef798b08864e0e0e765323b2970a43f7a83679856cccf119d8b9ccd83
font_01_sfnt_off0001000f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11826 10608 bytes
SHA-256: 9877b3344fc0626b86be0e10afe79345dac7dba2d726e720ba413cbf3e6a4780

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