Malicious PDF — malware analysis report

Static analysis result for SHA-256 41bf147e59545317…

MALICIOUS

PDF

80.8 KB Created: 2021-07-01 09:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5a8e45cf03cab18b0c70c4fa5fb1f2b3 SHA-1: 0d3f2c09818e91dd99eb0e701eff8d8d51034567 SHA-256: 41bf147e59545317c6d2fe0ef6b51dff20b0cf01c07c4db887d6c929fc80c83d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs, many pointing to compromised WordPress sites, strongly suggests a phishing or malware distribution campaign. The ML classifier also indicated a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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
  • 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.
  • 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://garglob.ru/uplcv?utm_term=clash+of+clans+wiki+update
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/18fldqrie2snitvb7gqn8vk8pv/rizuxatupuduzurula.pdf
    • https://roweryelectra.eu/app/webroot/uploads/file/16220027240746.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3eb5347c47---lamabefofokekofuw.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca1a11a15b---nedoviwutakorafaxanamosa.pdf
    • http://zdravi-kromeriz.cz/files/file/23083107329.pdf
    • http://studiospazioambiente.it/userfiles/files/matekarunofu.pdf
    • http://francisfamilyreunion.net/clients/870293/File/58323420471.pdf
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/86b2f392f148ed1e6d1b667fabcbfd2a/webagepejodaxoginumiz.pdf
    • http://businessvaluationapp.com//fck_files/file/zasanikekevejib.pdf
    • http://cancercareresearch.com/userfiles/file/89455210100.pdf
    • http://fittbikese.hu/files/file/ludeb.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083b0aa52529---lakap.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f5512f7f33aeb6c997b8843f73264bf1/68036305420.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b041cc0ed21---dudumopolew.pdf
    • http://adabaskimerkezi.com/upload/file/11495104636.pdf
    • http://curry-box-deluxe.de/userfiles/file/juvam.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/fa6a7da205c07d1339596d37e3cc0724/11711033519.pdf
    • https://nexusmediation.nl/files/ridalaxoxikamajubabomifo.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b91bb626e2e---93762571428.pdf
    • https://best-label.com/upload/files/tugiwoxutufozu.pdf
    • http://kapelski.pl/userfiles/file/beroneripukamoga.pdf
    • https://grandplaza.bg/uploads/assets/file/53724058494.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/7b7u2ucgh8ngsng0jcs7u1ass4/ruzosipap.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1a0d7c107---fibew.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_off0000cc3b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3B 16792 bytes
font_01_sfnt_off0000e448.bin
562d39cc93351683f3420870a5578826c1285db13c691c08f99be18f4980e560		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE448 1860 bytes
font_02_sfnt_off0000ecff.bin
eea92eb857e75a84def5f87324a0880088a0263666e7cae3bcf79202386e6fc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECFF 10924 bytes
font_03_sfnt_off0001065a.bin
56c74c4fd802ba73cb5543808d55a6a5a8539c59f3ed36a34eaa7fa8bdd1e9b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1065A 18396 bytes

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