Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f3c8de9f4a166be…

MALICIOUS

PDF

75.9 KB Created: 2021-07-03 03:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6271969d809b5a8dd9686f320900186a SHA-1: 5bad4ecf2f109c7b9321a372fdf357dd50b6bbee SHA-256: 2f3c8de9f4a166bef18ad0d9d507633f4627b985ea04dc031c5169743edd205e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point 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 for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/a9883e5dd5c81f63dd56fa0dfff5ef8b/64470525800.pdf
    • http://murielbellhomes.com/userfiles/files/48953903118.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/affb6dc8ce5b65f01dfeb709ad7ef92f/kusozidarujimifavanuwi.pdf
    • http://videofilm-tv.ru/content/File/61688678722.pdf
    • https://west-holding.com/userfiles/file/jivomuzosabokenexefegurog.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608acf50bffc3---42496006019.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c6705058801---23923229972.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/752d933cae128dcb1b397724981b943f/sewurujeranim.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/e9214885a4311b9ed0d504b0ab5c01d6/16915009827.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a462ede9a86---zasatadedokesirepu.pdf
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/87fecee4e6806174b2f7043658213670/gaguxekutogivadiw.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/f6d6674754b2841f47d55030243bf379/72059767428.pdf
    • http://twfindia.in/userfiles/files/67896976696.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90bf98d53e---43883449236.pdf
    • http://epoxidice.ro/mm/file/43756120991.pdf
    • http://campingwithconvenience.com/files/files/81242045031.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d569601ef---bedafakurogajuxokufe.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088758fa9e1a---boretuzef.pdf
    • http://soles2walk.cz/data/file/12484688211.pdf
    • http://besttailor.info/ckfinder/userfiles/files/81352918409.pdf
    • http://lctrading-gmbh.com/ckfinder/userfiles/files/60433332956.pdf
    • http://bocghedanang.com/media/ftp/file/11653741534.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/c6jb9fj2250ektvdh2a500kbcn/78364844810.pdf
    • https://dukra.sk/editor_uploads/files/kozadewonefazudenami.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160853e513ce53---43302059651.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607250773f1bb---rulusenedixukifavog.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=housewife+dressed+undressed
    • 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_off0000cef1.bin
08f9a5591774785dd97414c8cf0816f8cd7977017857107e6e85e81cb24d1ef7
pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF1 10216 bytes
font_01_sfnt_off0000e600.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE600 16792 bytes
font_02_sfnt_off0000fe12.bin
9c46a5843b091a1a2d5816eae06426cbd92f4a86f1942b6a255fe0953be85ac3
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE12 14312 bytes