Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba368ca60c1f6962…

MALICIOUS

PDF

64.6 KB Created: 2021-06-08 19:34:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d79650ec65218eb5eab028c842fe7bc SHA-1: 5614f3fbf2130b9e9a8dc36d2e3fb2c09e9aba6c SHA-256: ba368ca60c1f69625263f2f2204600054863c23e4ee561c554175b0caf028974
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a phishing or malware distribution intent. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, likely to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly suggests an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9136

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
  • 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
  • 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://catamma.ru/uplcv?utm_term=destiny+of+souls+michael+newton+pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1d59d90634245c26988d1ae1a3d43ff2/jadajilidikudotoxuf.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/1bdaf9be2b325f4d11643b543966f7f7/fegivex.pdf
    • http://vorne-sitzen.eu/pcms/content/file/xavozelisumividamipobi.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/32c2a5f61df9dbf5ded7fff2d2a868ac/kulaf.pdf
    • https://autotronics.vn/userfiles/file/rimojevageropanarewe.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/3eim8e3a5vfsulqpckuqnbhlfp/92151060498.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/abb3289bb7469e040160a668b8adbc45/84849565346.pdf
    • http://bagumul.com/file_upload/spaw_upload/file/20210520054151.pdf
    • http://shqinze.net/admin/upimg/file/%5C/98986206962.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce81ec9f67---73978143022.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081add644fb6---fibisevumuputoni.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c911aafb4---70911072094.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/eas3de0cf77ccir9k16ukmamtr/30252935289.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/om5oi386irf12u0k76kb76l78i/jufugofixubiv.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16082250c2f38b---panewemolagiditulelemite.pdf
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/160793efa44fcc---gowezarikunevelujepas.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/90a79d00250890eb02d8bc827046e995/19693821231.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/b41235f82246f268e350a635a564f1f6/60116338297.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/23414fda851ea7b06244a69885e1f0d6/10898691657.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efd0.bin
6fa26be061cdbb55f433dd5b890109db5f2c918a0a48a109587089bb16cc02a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD0 5492 bytes

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