Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6bdabcceeea7797…

MALICIOUS

PDF

74.7 KB Created: 2021-09-20 17:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a84aef8d6d5bf68efbc6f48cf9dbe37d SHA-1: fc299c5630adef9096c7cde1a36dcbe26a18bc2d SHA-256: a6bdabcceeea7797bf8ea3d76e2527599a4bec9b87f283f5629c1095f0294a54
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The presence of numerous embedded URLs, many pointing to potentially disposable domains and structured as a link farm, strongly suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e24167528b---98003095239.pdf In PDF document text
    • http://dostrojar.sk/UserFiles/file/natujisifigilidisaseg.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/37408786381.pdfIn PDF document text
    • http://receptlap.hu/files/83677215848.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/tefalamefi.pdfIn PDF document text
    • https://turkeyinsurance.info/images/file/ratavawolezigesiforomen.pdfIn PDF document text
    • http://reklamaopole.pl/userfiles/file/laxusiwavurusepefoxoveta.pdfIn PDF document text
    • http://pactolous.hu/upload/file/71256312359.pdfIn PDF document text
    • http://blccy.com/userfiles/files/xaxazotixa.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/tiserosipu.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/71728538643.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/36494817796.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/xegapuzanatajixipetulo.pdfIn PDF document text
    • http://familiehollander.nl/images/uploadedimages/file/66086382579.pdfIn PDF document text
    • http://tfe-design.dk/userfiles/file/16199734381.pdfIn PDF document text
    • http://huarui-bio.com/upload/files/2366433360.pdfIn PDF document text
    • https://testgit.begurholidays.com/uploads/userfiles/files/tofanerumuxaxujevu.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/wuzod.pdfIn PDF document text
    • http://hcm-invoice.vn/hinhanh_fckeditor/file/jipumevokuxugapavobonabi.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/nexazofaj.pdfIn PDF document text
    • http://cuacuonnhaxuongbinhduong.com/upload/files/mitevonijaguxikik.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/xamaparixexixe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=android+12+cameraPDF 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_off0000be77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68E 10372 bytes
SHA-256: 3fc93080e19ab4480f45a730bf4999c83b0e0c1f8e034908b2b672e8a39491d3
font_02_sfnt_off0000ee0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0D 19052 bytes
SHA-256: c59e8fb660ac19f57b194ce6222fcb53c62d0d140b78d21611a13baad6dd335b

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