Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f5c0f512e1cbd8b…

MALICIOUS

PDF

73.5 KB Created: 2021-06-11 01:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc21d683681f0a52d944ced47df47b15 SHA-1: fbadf25062e9d6d98c671ace5cc9b00eaf8cd728 SHA-256: 2f5c0f512e1cbd8bb36961495f6429bff40bc7aa07af26a8dc613dfcf672e4a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which appear to be compromised or hosted on disposable domains, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to downloading content, reinforcing the malicious link farm behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pistant.ru/uplcv?utm_term=s1+magic+coc+mod+download
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/2f2b25c1e7adbd3046bbefb27c093449/44758536019.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/bdb1956a43e9e75e2829e69a903e1724/1862155077.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0599789acf---53469977290.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869763de845---14738222559.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/1c04f9a624aec9deaafca873531084aa/xosovul.pdf
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16085c0d157085---gunukunositavitil.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16073f3aa1f5fa---67522403775.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccb59669e9---63329062674.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160797b95509aa---sotade.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160b16ff0c8528---xakuraguditewumiwanijuv.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900ff4ec96f---87217140949.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd77e3881cf---tebunadusirapega.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/2d39dfbc141e97f8829bd4bf25a3adf1/labasofofuk.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b46227d4552---susuzalitasiwolik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e226.bin
947fb5422c82948fdf61e3d28a8ed48d89ac6b348733aed33c967b0e1754aeeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE226 5232 bytes
font_01_sfnt_off0000f3f9.bin
f0e6e741e1a46514b32c12163a2fa9cfd1a5af2c801c6528aeca3e8b4e79fcb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F9 11016 bytes

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