Malicious PDF — malware analysis report

Static analysis result for SHA-256 6220457a506782c8…

MALICIOUS

PDF

78.4 KB Created: 2021-06-13 04:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d01294353d6242cdd4814d195a38908 SHA-1: d3e18b15d5012bfed53b28333623280c253fe8f4 SHA-256: 6220457a506782c8b6f8d39e56f6b28e71300a00ab027cfd601c614d0b115a42
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is classified as malicious by ML models and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous URLs pointing to compromised websites, suggesting it functions as a lure to download further payloads or engage in phishing activities. The presence of external URI links and compromised CMS upload links strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://coretry.ru/uplcv?utm_term=tv+remote+mod+apk
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/e0eb15c0ddde547ab02494a219c53751/65813757871.pdf
    • https://ihotel2b.com/upfiles/editor/files/87254593581.pdf
    • http://cobansut.com/userfiles/file/gezivofamuzelipanarotel.pdf
    • http://pampa.be/uploads/userfiles/files/tijeninod.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093a4c8e1e9f---25093501733.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/15fckb5q49sd0o3suq8ci92pud/towawujogapetipomusunodu.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0cc8f7dd30---kumosajoguv.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/6mu7e0m8setku3jdtcm949vj75/27820164302.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/431a5d3825b176208922a75c8e3f361d/nujanamonamuwanivipo.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1608e69deb560a---fojisirigumudepifozis.pdf
    • http://didopack.com/files/12541825192.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16098a49757c66---vupumisamulugizumaburamo.pdf
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/b9sapedb8bvfm9c0ovji3k4mfe/vogibuwugetivakazigujebul.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608062ac8d692---wewufikamelu.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/22d4c7f443f82a18e920460de9cc0e9d/kemelulijojuxedaxagug.pdf
    • https://mfdesign.hu/files/file/muxinoxari.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e7a443554---papakunajol.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_off0000f857.bin
84509242b1c8a1ce54b0f729eeb5b4b20481c09d3e1350d41d42447a9a733f8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF857 4968 bytes
font_01_sfnt_off0001092b.bin
fb03beb46b7ed16224d151df25ef4d4d35e5f569746e00a73e3668a463f17e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1092B 10480 bytes

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