Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe6d71eda4e786f…

MALICIOUS

PDF

79.5 KB Created: 2021-06-24 00:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 45566c5a4d9fb42d295c70047f13db8b SHA-1: 9b988e4b0dc8bda8cc1c7d6de356b8078bc5108e SHA-256: 6fe6d71eda4e786f32c1a50c222cd7967d3a92fed3c89d10c461785a00d8dee4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many hosted on compromised WordPress sites, directing users to download PDF files. The document body, though heavily obfuscated, contains references to game downloads, suggesting a lure to trick users into downloading a payload. The presence of external URIs and link farms points to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ketchas.ru/uplcv?utm_term=250mb+marvel+avenger+ppsspp+iso+game+for+android PDF link annotation
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/58246a3562b19e98d06426143c425dcb/93243703407.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdebadb73f---fuzetapawar.pdfIn PDF document text
    • https://nada70.org/userfiles/file/vetuwobobunox.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094908fb17af---laxojoro.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160810668d4b9a---48023577534.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d249de69f55---60463960038.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b685700ca4f---80119569958.pdfIn PDF document text
    • https://hijaulumut.com/contents//files/gojararoravaloparuke.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/xapamiwezekideje.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/14046717490.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff5ed4d73b---29417537527.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071c2f1a2425---14374360710.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5f5d13df4---molaz.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/lolelufefodimokazas.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/bazudunaje.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/12f47ee2ddbf84378775c0396972155c/mebofufejo.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/6a7f673614011794da156b733e2a70b9/46108979846.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/laforovitutobuduwerula.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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_off0000f5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A3 5864 bytes
SHA-256: dd49390bf0aa7625e97bb85c07159d24f874e93f0df3183303cf82bbbc1baa5e
font_01_sfnt_off00010989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10989 10980 bytes
SHA-256: be2ef850dc1f7f64c6ac373004ec2ce90896ea6f319b4f68e20f08e175f758d9

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