Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeece1b493533d25…

MALICIOUS

PDF

86.2 KB Created: 2021-03-20 00:57:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4ab087afd960883976dca1eb32964594 SHA-1: 973f9c30eca328995e0d1307826c09d85216e00c SHA-256: eeece1b493533d25273a3be1cc6fb420d7d12531c4047d211fb4e6b287316fb4
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document employs a social-engineering tactic by presenting a lure to install a browser extension or update, a common method for credential theft or malware installation. The document contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO poisoning attempt. While no scripts were directly extracted, the PDF structure and embedded URIs indicate potential for exploitation or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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
  • 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://botokaw.ru/123?utm_term=uc+browser+for+android+2.+3.+5 PDF link annotation
    • http://palikexifumalam.mywebcommunity.org/lekijajobufanegu.pdfIn PDF document text
    • https://cdn.sqhk.co/nemalerute/hfibghM/pac_xon_deluxe_kizi.pdfIn PDF document text
    • https://cdn.sqhk.co/nexetifosam/iVzimgd/52771468576.pdfIn PDF document text
    • http://migipobazu.mypressonline.com/falulifobaxugezibugamale.pdfIn PDF document text
    • https://lovapunosarimol.weebly.com/uploads/1/3/5/4/135401421/wuxudiro.pdfIn PDF document text
    • https://tokatukunopiso.weebly.com/uploads/1/3/4/3/134352811/a98902.pdfIn PDF document text
    • https://cdn.sqhk.co/luwibajik/hjijgjf/absolute_rc_flight_simulator_mod_apk_download.pdfIn PDF document text
    • https://ganunobagitap.weebly.com/uploads/1/3/4/0/134012575/9429107.pdfIn PDF document text
    • https://cdn.sqhk.co/ranotigu/kji9jhF/90989439053.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nefagolom/24646181205.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/19887888271.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/belazogupadijaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11ed68b7-f604-4aec-9299-a40c1770043a/93305871289.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37041e97-0009-47f6-a559-cf80f2f0fc1b/leisure_bay_spas_celebrity_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/55348995467.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/loan_agreement_family_template.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/7_eleven_malaysia_annual_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/tuvenazosajute.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/autothermal_reformer_design.pdfIn 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
    • 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_off0000f047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF047 5660 bytes
SHA-256: 7e68d6fd83bf011bd6c391ae67934c553ceac0c206b3b232e0a13e4e9cf7a9d1
font_01_sfnt_off000103b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B7 21284 bytes
SHA-256: eca75ce43d1ac2be7564b1aab42a93f5d7811907fd5da3b777f414e2cd3be5a7
font_02_sfnt_off00013532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13532 16452 bytes
SHA-256: 2c28e69920fca365cc890082193e872dcbbe8035e8f4878007a98f7937d36211

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