Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ecab59cef39ee2f…

MALICIOUS

PDF

80.8 KB Created: 2021-09-10 00:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3772936a870d5bc15437cfeb5938a26f SHA-1: 1d9a74df978f2d18294d18a3bcb747c83b554a3c SHA-256: 0ecab59cef39ee2f6d932aa72e943876dbc42a5cd7ddc0dafa792ef3eee9ce0d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to domains that appear to be part of a link farm, a common tactic for phishing or distributing further malware. The PDF SEO Disposable Link Farm heuristic specifically flags this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://tranhtreo.com/images/ckeditor/files/47361793358.pdf In PDF document text
    • https://raselapp.com/userfiles/file/kuranilekexubufomobaru.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/pufiregozozexiwolefijal.pdfIn PDF document text
    • https://computerzone.pk/file/40298208016.pdfIn PDF document text
    • http://architectureanddesign.it/userfiles/files/pikepezaredomozixu.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/40191992410.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/67629106572.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/38171841.pdfIn PDF document text
    • http://nasfthr.com/userfiles/file/baladizebarolefodovuviga.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/73186472177.pdfIn PDF document text
    • http://isdoor.ru/uploads/files/zetomofebafozaso.pdfIn PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/8722806605.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/9ee273686c8005e959b5f693a98118d9/55849304235.pdfIn PDF document text
    • http://phuketdriveschool.com/userfiles/file/vonutovosevekudomokevag.pdfIn PDF document text
    • http://grupophi.es/uploads/files/3778993027.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/wibojezuruxikubuneg.pdfIn PDF document text
    • http://vanlysecurity.vn/vanly/album/files/rifivemisiresevedes.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/jufalekikezikomejomaxe.pdfIn PDF document text
    • http://www.dean-cpa.com/files/adminpic/file/90193119185.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/17887729217.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/bikosokipifikugukaleviwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=what+are+the+best+guns+in+pubgPDF 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_off0000d8d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D5 17264 bytes
SHA-256: af276fa0cc0f5e8a6e4f5093672d66e56cc580a662fc9ebbb7748b2e7ea180d8
font_01_sfnt_off000105ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CE 10596 bytes
SHA-256: 92b83fdd895286da2703378b8c196b34a9acf6d7d860a59891ee8b3ade60f024
font_02_sfnt_off00011dc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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