Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebb8481cd34cf41f…

MALICIOUS

PDF

119.0 KB Created: 2021-07-04 20:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ddc5eecbb30a6a0db14f930d78d0e51 SHA-1: 79fabee504bb1519110ebbc999fee76ce70b3a0c SHA-256: ebb8481cd34cf41f8554dc65f283d27198e55db49a7d098a5780eebf5338aa4f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to external sites for further compromise. No scripts were extracted, and the document body was unreadable, so the analysis relies on the PDF structure and embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/afde792f0d649da072773da875ecd94e/24686400780.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f41f2b61fc---maxuredadevogoj.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/dmtulnjsnsqr9f0carrq2i6ar8/fudejonisuvimesedefago.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/28150cffb059e679054c1f1a9cd74a17/warolejusa.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826e9d6941b---didapamilunodonala.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/ggvosmmt56l5hjrfloi7j7hkm6/8266369715.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/6ibb3bdtcldkah96k75clebb40/golegafo.pdf
    • http://kaizenlife.com/ckfinder/userfiles/files/xukexegesof.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/8fc8149b0ef08edab481779b07579500/8716931275.pdf
    • http://kaztelcom.kz/ckfinder/userfiles/files/36164290159.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/ce6d2f188143232940b72c4e4247bbbd/14969690857.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/428a8d59c7873da35cf7a1939b401f87/90399893836.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608421eaa3513---dexokeganus.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/b9b4cb4d99ed569c35843c20e8b21800/25829491396.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5s22pcd9ds4b5261lqgpkvgdv1/45732383871.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/3d33c3ddd07a79331d737b1650a30cd7/matopirinizinu.pdf
    • http://dush-kz.ru/uploads/fck/file/26034642532.pdf
    • http://thietkewebbacninh.com/webroot/img/files/dajopegojufikewife.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/sawemowunugeza.pdf
    • http://3bbb.fr/ckeditor/upload/files/46126429132.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16080772ae727a---78985760200.pdf
    • http://leadershipcareer.kr/fckeditor/_upload/file/30317401434.pdf
    • https://feng-shuiworld.com/userfiles/file/55476315902.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160de709b4ec24---mepexamige.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097f74965dbb---wizilefejuj.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=class+9+chemistry+pdf+download
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016ff7.bin
9dbb621acfd909e702e26b132b34e25a103045d443ba5717077ff7a47979f034		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16FF7 16748 bytes
font_01_sfnt_off00019b92.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19B92 16792 bytes
font_02_sfnt_off0001b3a9.bin
61d54c17361183b3b88e3aa476a46b2a76f23129b19a7195a92154bda0aa4d50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B3A9 11284 bytes

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