Malicious PDF — malware analysis report

Static analysis result for SHA-256 c55454bb16ced499…

MALICIOUS

PDF

72.5 KB Created: 2021-09-06 01:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9166961fbd62d7b2588341cc7f41a299 SHA-1: dae5d9ebece82cfe82f6d17ec014d393338a8cf1 SHA-256: c55454bb16ced4991a180fb1d3ae58b380dcdae594d6c98861116e93ce976ba8
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and numerous external links, many pointing to potentially compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://m4krichmond.org/clients/3/3b/3bf4c986be49c21931b3574e72fd8103/File/4656579313.pdf In PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/83ahp6t4eaq9ldbgari7rb8pu2/95972705828.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/7263758540.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/98546814109.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/dononizaduxofapisusegax.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/19109617732.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/21976909528.pdfIn PDF document text
    • http://kath-kiga-bw.de/bilder/berichte/file/18328700263.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/14d9a05b613bc0f516ef96c9d1f869d7/48395985505.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/47077442839.pdfIn PDF document text
    • http://armanetti.com/images/tuvugeb.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/353370987d223dd475d2d8ade458824a/nufiwuvitavabedaduxin.pdfIn PDF document text
    • https://magnanelli.com/userfiles/file/dibiwufenepizepareval.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160be51decd142---86881634310.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/cc8115430778d4044b9b8c48eaaa79c4/rujulesewimukanejima.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bac3534eed4---tokokopolok.pdfIn PDF document text
    • http://servmed.net/userfiles/file/sebubezimovuwozojijepi.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/82729725754.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/sttvf55jgg2ordt8nilq182uod/22368821447.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/xokejij.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4aa1433ffc---99841975505.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/fda810831d4e0c67ce5c2af6c9b91633/winijoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=calcul+semelle+filante+sous+poteaux+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_off0000bb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB36 16308 bytes
SHA-256: c284ed99458292839b2c2a4d85f3ddb940632e41b609875a0c807b2fdccd025d
font_01_sfnt_off0000e2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EC 10916 bytes
SHA-256: e0a172b01803ac9e6a04c386b2cd84dbfd1ab02f55b88ad3123f226d8492e7c6
font_02_sfnt_off0000fc3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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