Malicious PDF — malware analysis report

Static analysis result for SHA-256 c93f17d3fe43eea4…

MALICIOUS

PDF

79.6 KB Created: 2021-09-07 23:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: c2e58cc317d2b45ca50dc8ad2185ced3 SHA-1: 0a09ad89fb6869590307e6a334383648982667a9 SHA-256: c93f17d3fe43eea4a8bf4d1a95138d5d8ce0fbc92ad9be7d2a82f343dd346ace
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://pi-consulting.ch/download/39680186316.pdf In PDF document text
    • https://psychotherapie-coeppicus.ch/userfiles/files/pudojugukixovoxaneweva.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/41175101412.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/xodemuxa.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c46c94ee8d3---6964271267.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/vufctf9sufsu2ud7ao17kskhr4/11835732300.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/lirid.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a3fd38b1e---89283733277.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0398387db---mubexelejugojenokafu.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160724e56c47cf---japipesovexefizum.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/26252229805.pdfIn PDF document text
    • https://creativenursery.net/home/creative/public_html/ckfinder/userfiles/files/55951951964.pdfIn PDF document text
    • http://sibinetweek.ru/userfiles/file/xawutumegi.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c867abc27c---79437179494.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/89656607329.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/7d7f442faacffb9ae685a56d0a8a6acd/pebuguwokidupedaw.pdfIn PDF document text
    • https://mb-classic-service.de/userfiles/file/8708159697.pdfIn PDF document text
    • http://www.toeterloeh44.de/files/14272575855.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf35e3ee32---48491792820.pdfIn PDF document text
    • http://industrialdevices.in/uploads/99791982322.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/69751923969.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/22069769835.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/86087360744.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=astm+a588+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_off0000d312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD312 10388 bytes
SHA-256: 8031d0662e432becaa40faf517ca1fa330f64ceda68cc11481ec6d856e437f2f
font_01_sfnt_off0000eaaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAA 18036 bytes
SHA-256: 143ef551cb66486fcb06ede97c227e8992c91eae7cb92fe4ff1ee3fac468f832
font_02_sfnt_off00011967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11967 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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