Malicious PDF — malware analysis report

Static analysis result for SHA-256 a91f1c929731960a…

MALICIOUS

PDF

40.4 KB Created: 2020-11-08 02:57:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5746a331ddf6bb7a2c4c6cb6927afc7 SHA-1: 7f21ea3bbce430caae82ff708a2c1103d699aff2 SHA-256: a91f1c929731960aa77b69c193d5e492453b2f2aedf036727da68056fae3ba59
94 Risk Score

Malware Insights

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

The PDF contains a link disguised as a download for 'Mcpe 1.14.1 apk xbox live', which is a common lure for malicious documents. The link points to a known malicious redirector infrastructure. While no scripts were directly extracted, the PDF structure and the malicious link strongly indicate an attempt to redirect the user to a malicious site, likely for further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/123?keyword=mcpe+1.14.1+apk+xbox+live
    • https://cdn-cms.f-static.net/uploads/4368951/normal_5f8d5c304d39e.pdf
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f8a521cda206.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/silubebebefuju/503195331.pdf
    • https://sufuvuse.files.wordpress.com/2020/11/3074016501.pdf
    • https://wiludilake.files.wordpress.com/2020/11/xomew.pdf
    • https://sirilab.files.wordpress.com/2020/11/pukoloxutudikadijogo.pdf
    • https://s3.amazonaws.com/rimejiguvif/whisker_woods_rift_guide.pdf
    • https://jopafez.files.wordpress.com/2020/11/supobijovinolaxunege.pdf
    • https://s3.amazonaws.com/fulomufimikim/timex_marathon_wr50m_manual.pdf
    • https://s3.amazonaws.com/novifamigot/huobi_global_app.pdf
    • https://s3.amazonaws.com/faluzotixupi/anthropology_books_for_upsc.pdf
    • https://bogenani.files.wordpress.com/2020/11/tonerakudariwatadasegu.pdf
    • https://pifakimep.files.wordpress.com/2020/11/fododuxuxinoni.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f68.bin
8a1881bfe91367de3292e92278c68528d7deec513b71795c001f53edf940021e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F68 5160 bytes
font_01_sfnt_off00007137.bin
0aac58b2b163c0ca63e00a6f8db91c38edb17ff238d86456b5d1a8b83984c37f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7137 10528 bytes

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