Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4003dd0d8778056…

MALICIOUS

PDF

42.2 KB Created: 2020-11-01 22:11:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 636790489ffa5aad5c3e34f034bde957 SHA-1: d5258228aec718b4a80c3cc64a41feb25803b900 SHA-256: e4003dd0d8778056e7698995d0340c6302a9b89412631d379cb81864504116ed
102 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?keyword=block+world+hd+apk+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_5f9332cb37421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370270/normal_5f9e62f6e58f7.pdfIn PDF document text
    • https://zejikato.weebly.com/uploads/1/3/3/9/133997407/8585072.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393345/normal_5f94debe32ea7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408197/normal_5f99b4e0db694.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5f8b43ac26781.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/3c7b045f-3228-49df-91d4-55542f67a6fd/kamepelaneratejunezonadu.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/51199996851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d781bbc7-3630-4841-a745-0403a13936fb/87609876670.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9E 5188 bytes
SHA-256: 920c508df19890faa57235ce4037eecd7c8a67c06b2a9b5f23c687ef310e28eb
font_01_sfnt_off00006f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4A 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off000077d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77D8 10492 bytes
SHA-256: 9fc29453862417acf1bebc0c0b5f6bdefff874071e4546c7f46cc184da81e3bb