Malicious PDF — malware analysis report

Static analysis result for SHA-256 95b2fc687464df47…

MALICIOUS

PDF

78.7 KB Created: 2021-06-29 05:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 229ad3b7360e8855f0312bd7af447932 SHA-1: f41b65777586c1aa4c14739ae7be3fffd09d76ab SHA-256: 95b2fc687464df47034d1c0b8c7096e07d1e2b7241b7a74b85866fa67f986cba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://archism.ru/uplcv?utm_term=an+african+thunderstorm+questions+and+answers
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160b7dcf98714b---47449894849.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160762b4375954---womuvudumamij.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/77421113292.pdf
    • http://andrelandberg.com/userfiles/file/wanodupexupowokebagi.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/eplf45nuu70lp7scs8qo397ui4/towizoworawo.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3d974e099f---pukizafulexig.pdf
    • http://busankid.com/webfiles/board/file///93085326252.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1609f789659ec1---11954504712.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a964ed1ade2---soduperelerefofonud.pdf
    • http://inwallendorf.de/userfiles/file/jujatilapofokudodidekemok.pdf
    • https://szekszardportal.hu/userfiles/file/30070555543.pdf
    • https://aawyx.com/sites/default/imageuser/file/51193171969.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4cf9788263---fapavesixebebisegew.pdf
    • http://pcccmiennam.com/media/ftp/file/fogukijenuworapimuga.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16074692d15015---31555702030.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dacec2fe6---3014104175.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/e83dca759be29035a3d61667ead7f093/zitewunakamerabepiwul.pdf
    • http://humanitool.ru/userfiles/file/dujetafilezigebutejo.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/os4qij23leu57hdp653t9e8uhm/69510389158.pdf
    • http://28777886.com/Lpf/UPFILE/userfiles/files/82042311499.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757ad91a851---norokojoxanafo.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ec5a43e02---doxenisideluluxitalo.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607556bcd0c2f---kaloturigapidenizawurap.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d7283679b54---26150077178.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e15be46abd---77659592265.pdf
    • http://baigeleather.com/userfiles/file/77439512183.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0f9.bin
b14fe269e53dabfdf9f13af11e10ece371bdec8e1b5022beb47547fa3f3ce805		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F9 16712 bytes
font_01_sfnt_off0000fb88.bin
6484ae440b93b529e91345bf4d07c741900676a0458db2609eac8b9e339aa98b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB88 11008 bytes
font_02_sfnt_off000114db.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114DB 16792 bytes

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