Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f202ee2ac5147cc…

MALICIOUS

PDF

86.5 KB Created: 2020-09-30 01:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: eed619952d6563344679c8dd032e5380 SHA-1: b703ded6f5f0c7252d5a65813f6946848c0f4789 SHA-256: 6f202ee2ac5147ccd69362a71a870b4bd12101820b457eaba64c8f92a2aacc51
154 Risk Score

Malware Insights

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

This PDF file contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that mirrors the malicious link found in the heuristics. The presence of multiple embedded links and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.
  • 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://ggtraff.ru/strik?keyword=nationwide+ceasefire+agreement+myanmar+pdf In PDF document text
    • http://files.lyonzred.com/uploads/1/3/1/3/131383664/lopakejiwob_bebibofarupa_kefij.pdfIn PDF document text
    • http://files.northcountrymgv.org/uploads/1/3/2/8/132815767/legafoloriju_gikerixu.pdfIn PDF document text
    • http://zivev.deckinaday.com.au/uploads/1/3/2/8/132814301/3118953.pdfIn PDF document text
    • https://site-1037266.mozfiles.com/files/1037266/40118335387.pdfIn PDF document text
    • https://site-1036965.mozfiles.com/files/1036965/buvegovazenuvetukov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/308730ad-69ac-453b-906e-1cd29036ad04/pikifebitudokeru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/153eff8f-be91-4289-9eaf-ad91d08572d6/64049309412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea2e5f29-a205-4f5d-98a1-2cab8dfae8ae/zisovukebatenogamomik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86cdff95-5664-4df7-bff2-d83b73f5331e/desutadoxatajerasepolozib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d46ce4fc-3da3-4577-85a6-adfb2207c06b/82611463213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6be4cd83-f374-41dd-bdac-d5fedf8f3c7b/60842444644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b11de8d8-fbee-490d-b9fa-d8db21dc3a6f/47600184344.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://scripts.sil.orgIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10236 5604 bytes
SHA-256: a87e2f986d9d6dcde09faa3a60ce30b110d7d98abfb0b287cf74bf374d83d0f9
font_01_sfnt_off00011555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11555 10112 bytes
SHA-256: 81614590db6aefea0e357781f62c40a176d0c1cb823e689c0a8cacf6a7650d2c
font_02_sfnt_off00013819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13819 6424 bytes
SHA-256: d81da3a2ff2d9078343aac857cf0acdb3923e72973cc8ed112ce497dacc7a46b

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