Malicious PDF — malware analysis report

Static analysis result for SHA-256 11014314f2541b36…

MALICIOUS

PDF

90.7 KB Created: 2021-07-02 23:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f5419e56d1ba880507fac3d6e1a4d77a SHA-1: b2acc90a074447a41d578bfb8c825759360ed31f SHA-256: 11014314f2541b36effabf993229616d13a0a9f980d640c1df1d8ed164521312
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress upload storage, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to malicious content or further exploits. No scripts were extracted, but the structure and URL patterns are indicative of a link farm designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://savaksangida.com/resimler/files/gusolemukukeruvi.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6667bc9ffb---73486189018.pdf
    • http://cdhsalumni.com/clients/28864/File/kavovuvunejapufovedoludi.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/64250355d99144c8f7cbebadf828044b/zapepak.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/215d247fff9f2038aafbb319ba7fba93/fidabesofetufokapixowo.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ddb2a5d95---65871511735.pdf
    • http://monkey-do.net/userfiles/file/rizar.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16077724016d8d---7552743794.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5bf09595c1---kubex.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/f285482c6a98640a90f718b172a139f1/dikozup.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160781233b3bc9---91758017901.pdf
    • http://creative-format.com/upload/editor/files/21686048550.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3af0764eb---kixizukaretufaf.pdf
    • http://zpb-maciejewski.pl/upload/fck/file/5398904741.pdf
    • https://ewastexperts.com/userfiles/files/58860586936.pdf
    • http://studioboscono.it/userfiles/files/70395483989.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160700cc9c1cc5---towubawudajizonumevekev.pdf
    • http://mtecommerce.it/public/news/file/vazoruritusokivo.pdf
    • http://ottotech.center/userfiles/file/86780984950.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16090a811bc21e---tepepuwivebopexe.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4c4752b89---tevesofen.pdf
    • https://oncallanatomist.org/ckfinder/userfiles/files/16236887804.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afce1ac732d---73523626925.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=accent+reduction+near+me
    • 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_off0000e9e4.bin
0491ab1f9781984131449868ed95f15036bddabad70a51597ae233fa8bdf08d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E4 16076 bytes
font_01_sfnt_off0000ff07.bin
9c1e773022ae0104574f16f358734bff8b8badd84111bd5a09967d7b2d3295dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF07 17340 bytes
font_02_sfnt_off00012c1e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1E 16792 bytes
font_03_sfnt_off00014435.bin
ef10c3090b87669da86a7e44b9df507e18cdf722ab3fb47d19490a22693f76f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14435 10400 bytes

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