Malicious PDF — malware analysis report

Static analysis result for SHA-256 832b346f3713cd5a…

MALICIOUS

PDF

41.8 KB Created: 2020-11-01 00:06:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6c22fca2f2d787d6712e5cf974abd7cb SHA-1: 25a39d7e2a506c370eab8e28cee76be054d0af26 SHA-256: 832b346f3713cd5ab5386507e4a3f13e9d838d97a6962205a05982c9fbe22e88
94 Risk Score

Malware Insights

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

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

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://ggtraff.ru/123?keyword=reading+detective+rx+answer+key+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408989/normal_5f933171b3238.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/vizum.pdfIn PDF document text
    • https://wazajodowefode.weebly.com/uploads/1/3/4/0/134017502/zolewafokit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371014/normal_5f908991a0cad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413226/normal_5f9830685bd10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375210/normal_5f925b2fcc49b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_5f9cc62c92cb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421336/normal_5f99489a19a46.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/dinisemowoge/76608404072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c50b2fd0-aa36-40dd-a3ce-b6370a1c6bcd/42971638018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e1cf507-43f0-4978-95f0-e7e2372899ee/41669521914.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/lezidimobulero.pdfIn PDF document text
    • https://s3.amazonaws.com/betimugi/the_tell_tale_heart_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/204c5b8f-3378-4b9f-b5a3-c97c879537d4/99261942050.pdfIn PDF document text
    • https://s3.amazonaws.com/vezosoluvezoj/westwood_middle_school_science_fair_packet.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DD 5684 bytes
SHA-256: 7ef30f7ad45e2d3e3fc3dffe16d8c70cda016bcd68f73cbe08191779260b1286
font_01_sfnt_off00007778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7778 10068 bytes
SHA-256: b9fb05c1124a86a1a8597391a24c1818fd06b4e0dd4117023d34b30e3e33744a