Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9e1b22115a889c…

MALICIOUS

PDF

89.5 KB Created: 2021-07-18 00:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 22f84a2d50d2c5c9f904a1b2ba6d03e3 SHA-1: 2b0543a6403a4f0ab01c4db5cb40ad5d0249ae05 SHA-256: ae9e1b22115a889cee0a80d9943320c5275de33f96c0fc5b467339e828d5d5e3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic suggests the document instructs users to copy and paste commands into a shell, a common tactic for executing secondary payloads. The presence of numerous URLs, many pointing to compromised WordPress sites, further supports the likelihood of this document acting as a downloader or phisher.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/03e9bc84d4218b33a060bf281a562e86/7653420076.pdf In PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/7a5cf88d363434397fde50b14cd72cef/49781367914.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e5023fae8---69630518752.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/39911413fa032dddf8dfae6d713a895d/4400490167.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/c1b1f76d80b82a0d20be2fe7299d7f0f/35310805713.pdfIn PDF document text
    • http://halmar.info/userfiles/file/xegotiten.pdfIn PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021061606174280554.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/70c0db5a30f96b11f93173fa58f34b18/31887423501.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/gufonubarusew.pdfIn PDF document text
    • https://vietspices.asia/uploads/files/41394764285.pdfIn PDF document text
    • http://taitung-house.com/CKEdit/upload/files/bodetirobixi.pdfIn PDF document text
    • http://shadesvalleymounties1969.com/clients/868959/File/92872454813.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pototop.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/nevirajefomuli.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/gasevidonalit.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2bff1bb2f7---61355467414.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/a024fd3b8ff4e0e6402e912b84802b6a/92494428727.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/palaximobasozujagipa.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608d06f77d7a5---jufonazijefamowixulepadum.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/v0vq3hoeg3a3mkubuibqqb4jc6/vokorinejunopu.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4076625b64---74390291723.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/sri4h1of68o53ke2f83c1t4oru/lagazuxuwa.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/k23ocfcn1rilojshae5b2cv3d5/11458379633.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+open+a+lan+server+minecraftPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EF 10784 bytes
SHA-256: c21fe37ad282f54af70da132c0cdb515fdb479cbdc41bf15e2758c873d6d4c5a
font_01_sfnt_off000112cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CD 17448 bytes
SHA-256: 6efdf24feff9aba5c4e856bba32b72d2143236b0501392c10076291952409185
font_02_sfnt_off000140a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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