Malicious PDF — malware analysis report

Static analysis result for SHA-256 e59e53a75ed9a34e…

MALICIOUS

PDF

88.6 KB Created: 2021-06-25 22:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3482537ac7927ab290ec1b1c261fb7b9 SHA-1: 153f3fc1528a193acd2378b31ad347b2043287e9 SHA-256: e59e53a75ed9a34ec888d07beab060ac420ce8571ace0d1df807295c6dcb374c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised websites and potentially malicious content, suggesting an attempt to lure users to malicious sites. The presence of external URIs and link farm characteristics strongly suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://coretry.ru/uplcv?utm_term=find+the+area+of+the+surface+obtained+by+rotating+the+curve
    • https://alarrabnews.com/images/content/content/file/49224537953.pdf
    • http://medica-brno.com/files/79589176894.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086aae8b0831---45431911432.pdf
    • https://stayatrosetta.com/wp-content/plugins/super-forms/uploads/php/files/33jq9ot72965k1a79dga7gb7i9/kizexiru.pdf
    • http://chsbicentennialclassof1976.com/clients/c/c2/c283bfa2537a82fb79a670aa087b4bd4/File/82381118296.pdf
    • http://prime-standard.com/piceditor/file/66021980273.pdf
    • http://bkdesign.ee/userfiles/file/wizewawuwusukalomom.pdf
    • http://foto-klub.dk/userfiles/file/gutubibodajometisis.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609be6b399be8---15402272713.pdf
    • http://adamslakeband.org/userfiles/file/divoj.pdf
    • http://bagiez.com/userfiles/file/gokutomutezejakuwekot.pdf
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/d8197ga7a0drt6uek12svjbhv0/80036473882.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b17efc3f95d---fawumexumuzitaki.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5da92967e6---13639672348.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cc4ec6491---mopukorivutatimodafazam.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/9fb8111dc82ad734a3f18893e7afc534/vumavawulesafu.pdf
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202104292238144278.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b765ef27c11---sufosawumevugumeto.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609792646c6ef---fawizogemusokaze.pdf
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/6397e18f1bb7184a03c692ef231976e3/lamiwitowegeletorunupi.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/240c70dfc23ea0ac150dabbc2a8b2b61/wogimulerewazokivuzi.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/kg740e8rf10tnj21i0talrkhk0/ravaxawiwavedus.pdf
    • http://samafb.org/uploadfilefiles/34137673482.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c80c0afabe---naromupujekonifevi.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_off0000f6df.bin
553ffadaf8a3ef2809638fc6d2d161b77067d6eeaffb0ec6c7f864ca26866b13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DF 16796 bytes
font_01_sfnt_off000122f3.bin
c1314b6cbbe99c46aca908acee9f09b66ccfc11f9df74ccedcb65023448bb073		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122F3 11108 bytes
font_02_sfnt_off00013ca3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA3 16792 bytes

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