Malicious PDF — malware analysis report

Static analysis result for SHA-256 3147afcc335612d6…

MALICIOUS

PDF

90.4 KB Created: 2021-06-27 05:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 901c0407cc53645eb0af60880bf516d3 SHA-1: 7bfe37525ee859e99c786be4d5a73a13edd2d4c7 SHA-256: 3147afcc335612d60c0742f16f1a464a980ad891bf1737d4b6356913d43db60d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://emotionpicturesfestival.gr/userfiles/file/41715547224.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/78163cec1a634b4a38d2eba01b20b08e/gasenekowulamib.pdf
    • http://allprintusa.com/admin/images/file/38683155154.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/d03b994907cbea154566edd5eb1fabbc/wesunugiwataxopefoja.pdf
    • https://ddshower.com/ckfinder/userfiles/files/62435830451.pdf
    • http://ggmtc.net/userfiles/files/manamebiwo.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/hqrrenp21fvm08ikvnmrlej7ba/rodowusonipoxowixadaruta.pdf
    • http://mnogonomerov.ru/uploads/file/vunixusegi.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085a8fcc8550---81663079314.pdf
    • https://konferencii.ru/js/ckfinder/userfiles/files/73627144913.pdf
    • https://villadorottya.hu/uploads/frontend/files/vupelifutefupokujaxol.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc7f3d9a5b---jejugirona.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080336687ef9---3713378480.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608472d7505be---wapudi.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc3fe9b70b---padozuduxal.pdf
    • https://ajitcoatings.com/uploads/99292086160.pdf
    • https://infoenergie-loire.org/userfiles/file/45561589197.pdf
    • https://securityguardsupply.org/php/uploads/file/51857886171.pdf
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/56195230137.pdf
    • https://giustofiori.it/file/dewudi.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bf57787d195---17036673787.pdf
    • https://ka-base.no/images_content/file/61767722311.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=synonyms+test+practice+with+answers+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8b9.bin
9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B9 16092 bytes
font_01_sfnt_off0000fdff.bin
bf9e75b17f1e801f99d84c59645171b718ffcf19a9416e4bb435bb18f3dbaa69
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFF 11112 bytes
font_02_sfnt_off000117cb.bin
4cf32827a1f13e8b91783cbc78887d4d1eed94733fe7323724cbb2011fe3b42d
pdf-font-stream PDF embedded font (sfnt) at offset 0x117CB 16968 bytes
font_03_sfnt_off000143c1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x143C1 16792 bytes