Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1e14af3c590196…

MALICIOUS

PDF

90.4 KB Created: 2021-03-15 02:04:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a0eb24ab5c6c4731be723c59eb09df5 SHA-1: 2adacc5ef0ac53882ef2582a6a40c8ac99cb5b37 SHA-256: 8e1e14af3c59019658fd3d0d1fc29b1c4634a8afa2f028766afdac809464145d
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. One of the primary URLs, `https://bologen.ru/wix?keyword=thoongavanam+worldwide+box+office+collection`, appears to be part of a keyword-driven link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=thoongavanam+worldwide+box+office+collection
    • https://static.s123-cdn-static.com/uploads/4402932/normal_5ff7c8db9c6e9.pdf
    • http://zitupow.medianewsonline.com/business_information_system_free_download.pdf
    • http://tanivikovome.sportsontheweb.net/85098294582.pdf
    • https://static.s123-cdn-static.com/uploads/4486045/normal_5fc5f05b476b5.pdf
    • http://jakusavu.sportsontheweb.net/far_side_theme-a-month_off-the-wall_2021_day-to-day_calendar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gixarewujedel.atwebpages.com/what_is_the_order_of_twilight_books.pdf
    • https://uploads.strikinglycdn.com/files/19a86f7d-61b2-474b-b857-a1fc4a029f59/nigedazixux.pdf
    • https://s3.amazonaws.com/zesotat/how_to_do_2_look_oll.pdf
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_c8af35819cdf49e39b1e2b1d37a66356.pdf?index=true
    • https://s3.amazonaws.com/salosibejodod/7885810025.pdf
    • https://uploads.strikinglycdn.com/files/f5b311fb-9b04-40a2-846e-af6823f26c6f/pro_tools_11_osx_crack.pdf
    • https://uploads.strikinglycdn.com/files/d6f97b40-8eee-43f0-8d82-58cef54719f7/nupelozenejavizibe.pdf
    • https://s3.amazonaws.com/lemefofutomapox/lewotipodinasopinepu.pdf
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_4aa0da34f08f459c9d45b7a86df23b69.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b3a919d8-0827-47c6-9200-8c8bb53eb084/how_to_be_a_gentleman_book_download_math.pdf
    • https://uploads.strikinglycdn.com/files/7a6f46cb-a677-4848-bb42-dfca9cb5a569/james_patterson_books_by_series.pdf
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_f4e487408e3843ebb807d329929dfab7.pdf?index=true
    • https://12dd324c-696b-4d67-8c19-991f3eacec2c.filesusr.com/ugd/eeb7bd_2cfa9520879842cba9e7d28494f5e60a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/369bf5f0-f2d8-472d-a6f0-3b978f8bc9fd/52061102587.pdf
    • https://s3.amazonaws.com/zikeko/95077027885.pdf
    • https://uploads.strikinglycdn.com/files/39f0d9c0-4d7c-481f-8a68-7e738e3a81e9/wendys_medium_fries_nutrition_information.pdf
    • https://uploads.strikinglycdn.com/files/56321407-0368-4f90-84e4-7e14997d5225/ipad_mini_2020.pdf
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a37.bin
1b6b9ef3cce8e7b97b167b809facae2e6ae6d8881065cca70618c088d4eac7c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A37 5564 bytes
font_01_sfnt_off00011d17.bin
6a1422c53cfe740c2421d179247f36d8246dcaa9efc80838f34f62f0eb5ad4e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D17 11480 bytes
font_02_sfnt_off00014474.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14474 16164 bytes

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