Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb137b1024a2750…

MALICIOUS

PDF

87.9 KB Created: 2021-09-12 10:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d76e22b754eef5395e015265b20ef483 SHA-1: 6c10e3103a98ee9de7b73516b8cfaeed72ad5281 SHA-256: 9eb137b1024a2750f88629ae99e3fb8b0d9c5fe8c082135a4e165f324194c278
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with many pointing to suspicious domains, indicating a likely phishing or malware distribution attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further supports this, suggesting the PDF is designed to host many links on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://zentrumok.com/userfile/files/52868028553.pdf In PDF document text
    • http://www.guus.edu.mn/ckfinder/userfiles/files/54926885186.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/selagudejasakulemezop.pdfIn PDF document text
    • https://lifeteacher.tw/uploads/files/202109050243495135.pdfIn PDF document text
    • http://teamwork-poetschke.com/ckfinder/userfiles/files/95626701516.pdfIn PDF document text
    • https://spacio.hk/attachment/file/51626882627.pdfIn PDF document text
    • https://buffinvestment.com/upload/ckfinder/files/janoxis.pdfIn PDF document text
    • https://yellowmangocafe.com/userfiles/file/25779409208.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/43408599802.pdfIn PDF document text
    • http://zhuoer.ltd/userfiles/file/bemonogozatuzak.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16131a47e6ab9f---rukigabunikusazol.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/livilefozejitibova.pdfIn PDF document text
    • http://calisnt.com/uploads/files/kixixebirafurubujepef.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/mojefagesilukozevezukaso.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/70504959657.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16133e549be8e2---birilivaxexusifuranuf.pdfIn PDF document text
    • http://bjjiffy.com/upload/4277365540.pdfIn PDF document text
    • http://tincorner.vn/uploads/files/labigakaziteluvemipi.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/lumiku.pdfIn PDF document text
    • http://interroadholland.nl/userfiles/file/bipetejowezulafe.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/10901737750.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/posigodesamibefuwomafitos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=the+art+of+the+short+story+dana+gioia+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF107 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10919 18756 bytes
SHA-256: 65ba7d8bfe8c65572881ff9708eaa332a9af083b55bd6b899a8ad024209d5ee2
font_02_sfnt_off0001397d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1397D 10808 bytes
SHA-256: e1f69549170504999805bd8fc81aa48ad35e5bd1c43a616cbed13265940e56f5

Open this report in the interactive analyzer, or submit your own file for analysis.