Malicious PDF — malware analysis report

Static analysis result for SHA-256 9293b4e36e01db2d…

MALICIOUS

PDF

104.3 KB Created: 2021-07-06 00:38:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b8dfd5cf2652282b11b99d4f06877a7d SHA-1: cbaf9f244bd82fc5ab12bc2defe5775ea638ec07 SHA-256: 9293b4e36e01db2db5d8dae1e573080d6a64821ffc2cf4e09080efbfa13a9b3c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to exploit users via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078139961cfe---67523238552.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/042de28f64cdcff735f716a2e9199a35/59577529867.pdf
    • http://anvlaw.com/userfiles/file/30032680515.pdf
    • http://goldartline.ua/userfiles/file/80683075068.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160927b9d204b2---36590790246.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c68fad6c7---90883944101.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/g16n17udbuuqged94nkje4hbj9/rabosiguginezeve.pdf
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/fc0161df1a078ad491ca7a6b5cd5b445/99908989121.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074bfe2c226a---48854677946.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/2ae8104b21e1736cdffaffc471391ec4/tobav.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609833ad70dfc---nijisukelilekof.pdf
    • https://ijmscr.com/ckfinder/userfiles/files/56054640548.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/28lmjialg8n46oltaa9ti0li8u/xofowenororasijaxegoluxaj.pdf
    • https://cargotavio.ru/files/file/weladakozosuwonitima.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/d58b140dd76560371795decc80e7cb7f/viwopelozegeputurifolipa.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/vf6vc1a876v47kh53n8tm5qumg/pobewe.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609a73f99cabb---tupolalebon.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/2d56aa37731c50978f7d83b40b0d421e/pizunitemalezaza.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160aad2377b781---98199555156.pdf
    • https://airshow-bg.com/file/34519616084.pdf
    • https://mumegram.com/userfiles/file/wenijagureruzukugosikura.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ca703dbed---70895720219.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/2bcdhnr85nucvg9j81t8p5bgv0/renenibenu.pdf
    • http://attlas.center/userfiles/file/vimafafita.pdf
    • http://ufnk.fr/app/webroot/files/file/34852740918.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=add+in+for+word+to+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_off0001333c.bin
31390b7836624ed3c9199a2a1e56f0969f7e4d8d61c56fb1195e0ccc1fcdbd57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1333C 10052 bytes
font_01_sfnt_off000149ad.bin
350e9bd54e88a7f093360f328c10a7f64de9b54fbfa533bacca950d4c9ff53d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x149AD 18660 bytes
font_02_sfnt_off00017a51.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17A51 16792 bytes

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