Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e6f7e4953e1810a…

MALICIOUS

PDF

77.8 KB Created: 2021-08-27 23:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 07b7517c930ee8a6742aa6196ddf8d4d SHA-1: 005e7f7bdcd71e4985690dbf157a8b1aaa38ea6c SHA-256: 1e6f7e4953e1810a3c2eafab0c3de750c9df92b7a8968eb4f0c8204e5c021da8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly indicate an attempt to trick users into visiting these sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7857773d6---polaloziw.pdf In PDF document text
    • http://kraski-chernila.ru/resources/file/1189980122.pdfIn PDF document text
    • https://angkagenap.com/contents//files/gerekukexumadurulelon.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/57qap2cqff481ua7rsd97t2kq0/zugorovugatawu.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160930ee20c7ce---33061812034.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/20546511403.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/98042211929.pdfIn PDF document text
    • http://resheto.ru/users_images/fck/file/19857169672.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a2c1a0655---lobuvesumelikute.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/289807214.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16073f7753f963---fizaguwis.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/muxuvewumazeji.pdfIn PDF document text
    • http://jar-ted.pl/file/pawisaxodidor.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/pitisa.pdfIn PDF document text
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/27972480380.pdfIn PDF document text
    • http://xnucleus.com/members//member_images/files/rotibawutazorilisime.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/tamivuvibato.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/351cba8678933f4769d4077d2b7ce7d5/65885171575.pdfIn PDF document text
    • http://zimaletto.com/uploads/file/95410326203.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/32226068744.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/f080ae7ed8dd4eeb2df078a85de95443/17957040103.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/kazologifules.pdfIn PDF document text
    • http://islandpointfl.com/userimages/66215678029.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/35288776952.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/8577009880.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=understanding+mm+cm+m+and+kmPDF 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_off0000cb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE368 10644 bytes
SHA-256: d518764f6fdd347a2ca7d7b8e17dfbcd34576de84fae6a43059cdd6ea6158fdc
font_02_sfnt_off0000fb87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB87 17400 bytes
SHA-256: 33dc414fa373d41c9f0415753f8ae1e1442851b35faa16dbe10574f0e77de2fd

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