Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e0a924e08b0c8ed…

MALICIOUS

PDF

77.5 KB Created: 2021-09-01 21:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3ae467e96713a13705efabeb9f64be22 SHA-1: 357259680e1d1931f4a7d91fbde00491a7b7dfb9 SHA-256: 9e0a924e08b0c8ed5eac2b32af4522605ec0abbf75b16eec18c6718417c79b88
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/8def50b4d58aa3297c37ed4cf9624f7c/75594499408.pdf In PDF document text
    • http://valifyrepapillon.com/clients/6/68/68e1c6a84db99a04c21676ff826d6e37/File/mevemoxu.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/papiwesa.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/14921015366.pdfIn PDF document text
    • https://moscowfashion.net/content/xuploadimages/file/batifi.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/69118058841.pdfIn PDF document text
    • http://gdwtechnology.com/fckeditor/file/76291937998.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/95379628895.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/88e2fdf3e539041f2f3a7ad6d71849e2/18243993464.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105d521ae4de---22487455865.pdfIn PDF document text
    • https://vieclamxaydung24h.com/upload/files/vufareb.pdfIn PDF document text
    • https://virker-ikke.dk/files/fepofipexolike.pdfIn PDF document text
    • https://istanajp2.com/contents//files/sawojukajizudilota.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/makefureworinivikudi.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b5191a32d---14733908575.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/xexitadedejinokobukeniwe.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/98512081787.pdfIn PDF document text
    • http://rezidencianestor.sk/app/webroot/files/ckeditor/files/vifidexaguritodires.pdfIn PDF document text
    • http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49551467644.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/xarawakikuduxopomibibesan.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/fe37d649a22b4bd213a5f3d2a5c42b61/3119066799.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/pupajanizorobozojolitif.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dq25o8l4qsmhi4uj25f0n12ma2/nusatesulelug.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/67ca93943e102f063b51f0b9e8901a31/lojoko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=thor+movies+in+sequencePDF 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_off0000cc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC13 10464 bytes
SHA-256: 379767cd1b403791f443d53ba6ac79ed72e684ac773e08333976d91ac10d8991
font_01_sfnt_off0000e3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AC 17064 bytes
SHA-256: 03c7ba0c060e066769ef49bb475a8e20468a3d9f75e35a38459253d2c6845c97
font_02_sfnt_off0001102b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1