Malicious PDF — malware analysis report

Static analysis result for SHA-256 97a9dd19a3c434d6…

MALICIOUS

PDF

63.8 KB Created: 2021-09-14 01:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a811d356064ea22a1948d9149d04903e SHA-1: 1fd8a0539ae456ff979c2d1b0df7bae9fe539a17 SHA-256: 97a9dd19a3c434d626c3493e431204ee6b2f53d0d1bdb2d2f57722fea9de7eee
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to obscure the true destination. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification also flagged it as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7025

Heuristics 4

  • 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
  • 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://mecateengenharia.com.br/ckfinder/userfiles/files/xojupofegalesis.pdf In PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/jizizagivafup.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/55425814862.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613780d41bd81---ridokobosi.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/muduxares.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/6398580638.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/lijazolifowob.pdfIn PDF document text
    • http://adas-muko.pl/photo/file/3734260653.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/43928592988.pdfIn PDF document text
    • https://groupburuemas2.com/contents/files/97175087931.pdfIn PDF document text
    • https://gosselindesign.com/images/from_fckeditor/fichiers/wevulogu.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/ridurako.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/rafunujovevuve.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/d36617ead742cebff2f2fe8d526112ec/14537530123.pdfIn PDF document text
    • http://epicridesnepal.com/files/sosako.pdfIn PDF document text
    • https://unitjaya.com/contents/files/wodegiguvarub.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210904003643.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/gopujerizet.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/14242582974.pdfIn PDF document text
    • https://istanajpdua.com/contents/files/jefokunevurikuda.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/zafeboxegunozelawugo.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/nisasasovimoxifofovuro.pdfIn PDF document text
    • http://www.jasolasia.com/image/upload/File/fopavisopamos.pdfIn PDF document text
    • http://geotersrl.it/file/34096256465.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+use+my+phone+keyboard+on+laptopPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD99 11088 bytes
SHA-256: 17c148e61749bca067d3d133760ad19aee84e6ccc379bbb540dc6b62566cb923

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