Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45fbe828515d180…

MALICIOUS

PDF

74.8 KB Created: 2021-05-27 17:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0c9b7776a0cebc05a974df5ed042c6ad SHA-1: 48078417da6e718d7fea19ef7ce637d3e935870b SHA-256: e45fbe828515d180739abede34974b1f194f2ae958599511f2ca41d8b4f44b7f
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to various compromised websites, some of which host additional PDF files. The document body, though heavily obfuscated, suggests a lure related to legal templates, specifically a "free general power of attorney template uk". The presence of embedded URLs and the heuristic firings related to link farms and compromised CMS uploads strongly suggest an attempt to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://anthonygillant.com/userfiles/file/jononenosanobidevo.pdf In PDF document text
    • http://tubietelbar.hu/uploadfile/25670722190.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160714c3030fec---7859008470.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/jizufebez.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609689b2e8558---jilozomilolajomapiduwadis.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/6vj5ogfnjol0sp8757vle2p3b1/43228387844.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/b1db82f34a10b6994a87867028045859/9716164116.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074008b4aeab---nipujezinuzuzatukovomez.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a169aee548f---20856784406.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/h3pvtl527a4lmu5mioosuqkbje/tijadorugizisivap.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079ec897ec4d---fogupim.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a51783509a---xorevikukijalifigida.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a54fef6c8ee---21235788451.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/0f4416c4766541cbb97a231aca7ac51b/susivefuxuzu.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087dc702f783---figazon.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/e2cbaf08f96b4b655bb4879d410b2869/padukex.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/2985608440.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=free+general+power+of+attorney+template+ukPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE793 5256 bytes
SHA-256: 3fe8b7e00dc16b1925f14755edf8351b990c891c63c39c1b5e2c5612ef38d092
font_01_sfnt_off0000f985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF985 10924 bytes
SHA-256: 682658d65edd8fb2f9f3015359f31289bc1d3fa6e7853a83cc3acee14e75dd37