Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa75a0ae004726f…

MALICIOUS

PDF

199.7 KB Created: 2021-07-04 13:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3036ca603b812786c967e91fbe619268 SHA-1: ef4e1480ee75cba53a5e0be21f3401f5f46785c6 SHA-256: 3aa75a0ae004726f357255b66b0d4e9a455ded8c92ed711f634f3fe541093038
146 Risk Score

Malware Insights

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

This PDF document employs a social engineering lure, instructing the user to install a browser extension or update to view content, which is a common tactic for malware delivery or credential theft. The document contains numerous links to compromised WordPress upload directories, suggesting a pattern of hosting malicious files on potentially vulnerable websites. While no scripts were directly extracted, the ML classifier and heuristics strongly indicate malicious intent, likely involving the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9808

Heuristics 6

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • 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 http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160a8f3c477e12---kedigixibezafise.pdf In PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e869e7124---40403869057.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5a30eddb9---ginigilenefupewewufesu.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/70162a600e08639257e9506886f7ef54/41027891870.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9b11b9883---kexovalofelegefofuf.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/52961174203.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/25820059863.pdfIn PDF document text
    • http://bydnjl.com/userfiles/files/31748049929.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/0582b4efd267659bb13757806907fbcf/wulax.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/62284954193.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/36602729798.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce16b6661c---rexebevadizomanoginib.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/70748744621.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/27555637299.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/452cfdad41c54f40262ee3f311f88040/4233915427.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210615184428_1673222452.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160743a29acf44---47843811449.pdfIn PDF document text
    • http://szkolaprywatnaleszno.pl/userfiles/file/gatovugobuviremowawodima.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/44o09tv923uersga7uj11vpc46/luvemuvexoxet.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/d107fe99041e0c957ac713b37e386638/34638402672.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a88f7b84d3---fufovowelikixenidizufokan.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/62290415266.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9ed8a379b---kojadinuvuf.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/b2a072d5ee8ec7b1741fe008b8655d36/wejobumanedewi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=arm+microcontroller+projects+pdfPDF 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_off0002a87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A87F 20716 bytes
SHA-256: cdce8a66abd8b58ed4429d0077293a24e4e5b1c81128df72e1142144e9bc2263
font_01_sfnt_off0002e034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E034 10728 bytes
SHA-256: 5b487a1651e53b4cf402c2fc0c23fdab5f0c1f6a23d52bcaf5d3df5e9e24fccd
font_02_sfnt_off0002f8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F8C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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