Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9dc36962eddbfb2…

MALICIOUS

PDF

89.7 KB Created: 2021-07-24 10:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 57092158e2c05e3ca0c34b3362886e0a SHA-1: 2073be57b51251049bd44afc561e915945b478ff SHA-256: f9dc36962eddbfb26d756028be86a508087ec17e4d8b9e13b1ef6eeec75bb248
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f294b1f20---sedajizapabal.pdf In PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a911a15794---butivojirojarepujirafe.pdfIn PDF document text
    • http://jhferry.com/data/fckeditor/file///vowolapagefujonobisakewam.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/7308819076089b252b71cb.pdfIn PDF document text
    • http://noithatdangcap.vn/app/webroot/uploads/files/74356011340.pdfIn PDF document text
    • https://castel.ro/userfiles/file/41790773990.pdfIn PDF document text
    • http://ty-int.com/files/files/xurugaxakemakikakexuvi.pdfIn PDF document text
    • http://cke.hk/userfiles/96342739455.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/55878540273.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160dd73b2b4fa4---godetemewozajakuxuj.pdfIn PDF document text
    • http://suseefinance.com/userfiles/file/60448479420.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210721_AA83D97064F3FA1F.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/ab8e48a8bcaba3e375c5b9db8398ff26/88978794434.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/6169991846.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/4f4106014cdfadb87b1290cbb35c7094/45452191954.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7ad535ebffebf27f9ca616d4cec2fecf/33174213948.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eced3de9e2---segazi.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/xisizedusojabavutiwatopi.pdfIn PDF document text
    • https://crownprolaw.com/userfiles/Proj_Name//files/pepomul.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/47612177193.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d325d0e4854---32705226230.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da7f7697187---rawotuzu.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbf356994f---likusudosupisogujozu.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/munolipu.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/43568316033.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/34842353041.pdfIn PDF document text
    • http://schmetterlingsgaerten.de/file/nizubedunuxodo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=what+pods+can+be+used+in+nespresso+vertuoplusPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F7 17988 bytes
SHA-256: f049de1e66acb2a6c79189e59f2de9909426a59c4ba83c03733d0e546fe82e4c
font_01_sfnt_off000127c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FDD 10908 bytes
SHA-256: 0c8b8cb2915dea447eaa21993edd2d7c9ad8319a60113b6d4023401d8ce8f39d

Open this report in the interactive analyzer, or submit your own file for analysis.