Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eadfc73bedd1fbd…

MALICIOUS

PDF

70.6 KB Created: 2021-09-18 13:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f90f976b5289bacaace047626aa7559d SHA-1: 282b2d485fde64b10f01c78d65aa060d8c1d9288 SHA-256: 9eadfc73bedd1fbd656582eb2a989fe76cfcc86d6018de011e05ea11aef07606
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress upload storage or disposable hosting, suggesting a link farm designed to distribute malware or phish users. The presence of embedded URLs and the overall structure point towards a social engineering attack, likely aiming to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://samocvet.org/foto/ck/files/76518851895.pdf In PDF document text
    • https://alves.bg/ckfinder/userfiles/files/69001867735.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/nukerogatofanajokovipon.pdfIn PDF document text
    • http://pizzeriagiganti.ro/imagini_ws/sorudumowaduxomopuvaji.pdfIn PDF document text
    • http://aescantabria.es/upload/fckeditor/file///pirasim.pdfIn PDF document text
    • https://morethancars.eu/uploads/edytor/file/30567344464.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/zenowixivarogowomewize.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/749aaded57865656b74bbbec86055066/5064629441.pdfIn PDF document text
    • http://fuerst-architects.com/uploads/file/57137571654.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/31585775209.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/wewarub.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/34871442753.pdfIn PDF document text
    • http://sinorarechem.com/upload/files/tefoxug.pdfIn PDF document text
    • http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/19800563940.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/25937060127.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613d53a9726fa---3232188319.pdfIn PDF document text
    • http://jtipartner.com/ckfinder/userfiles/files/48747892100.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/88476592582.pdfIn PDF document text
    • https://peiitw.com/Upload/ckeditor/files/pinuronupux.pdfIn PDF document text
    • http://avon-bratislava.sk/files/files/40432865203.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/lapugu.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ada60ut0s246aqnvcrr5efojil/kuguja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=prince+of+persia+3+game+download+for+pc+setupPDF 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_off0000b11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB11B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC92D 16304 bytes
SHA-256: d02db5038a2e55058549a87cfdc2069ef20fd4a9537f839214901a16cbf71864
font_02_sfnt_off0000f289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF289 11320 bytes
SHA-256: d6d67ebda5d86ac7866c2707f0d39d2e6193d32f310d8b38168202daf7361d7c

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