Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ce92f3b55fcfd2…

MALICIOUS

PDF

82.3 KB Created: 2021-09-06 17:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 704c09a3fdc2aee0272d7d75e26d5719 SHA-1: 3d007714e47620f57c419abb3e486eeefa5530dd SHA-256: 06ce92f3b55fcfd2fab5495825f3ed1680baef2382d1228d3d58e9b657a4841a
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to potentially compromised or disposable hosting. The PDF structure itself does not contain executable content, but the embedded links are designed to redirect users to external sites, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://shinies.ru/img/lib/file/wekatepoxurepu.pdf In PDF document text
    • http://www.kickcommerce.com/userfiles/file/loxakefarotefabatik.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/h47c5m77lklsfvkti1e8ee5902/wemefegowoku.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210826031912.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/p5f42f369h9np3ejgfrjtet601/61463426676.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/33140152725.pdfIn PDF document text
    • https://beauti-full.ru/uploads/files/sepasorinotenanamiwobovo.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07280bf63d---81559672006.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/rokiwixobodobofavaxe.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/pakijepubolifunimalo.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/672aed872b69137492bb5b3606ecc142/85157115943.pdfIn PDF document text
    • http://benjamin1908.com/clients/f/f4/f4560e3fe432b95d15e234f900dec36a/File/fogunurepomagedojudeb.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/97986190474.pdfIn PDF document text
    • https://www.weldcor.ca/public/ckfinder/userfiles/files/zefekurubulawuvax.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/9684541856.pdfIn PDF document text
    • http://www.ocptecnology.com/admin/uploaded/fck/file/34478371010.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/51836321177.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/32317682432.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/93827838594.pdfIn PDF document text
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jibosuj.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/zawiwowovonuwiz.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/d9526e6b4eeed92785b9906089bd908d/71522456865.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/gugidizosawumadoridabazo.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages//files/68472295053.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=separator+oil+and+gas+processing+pdfPDF 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_off0000dcc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DD 10868 bytes
SHA-256: cbce9b2be36c3214f5f9fd7757b7f1c94f7d3d5efb88bb71e349c8a3157d3edb
font_02_sfnt_off00010dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCD 17560 bytes
SHA-256: bea35aad3cbc812d0bc9d6729ede373026e76366e14e24e9d0a66653e78dd3aa

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