Malicious PDF — malware analysis report

Static analysis result for SHA-256 3458a2d85ed2fe0b…

MALICIOUS

PDF

69.8 KB Created: 2021-03-29 04:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2bff63c0b8afcdf84295ccbafbe8872f SHA-1: 53fe58be567c3d458b1fa9001b5cdc67d3677b84 SHA-256: 3458a2d85ed2fe0be93598489783dd7aff5618e099456cf7a9f6d5e8e6ac4dfe
106 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway scanning. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/award?keyword=sociologia+da+educa%25C3%25A7%25C3%25A3o+alberto+tosi+pdf PDF link annotation
    • http://pelabinowoguk.getenjoyment.net/fumimojiroxujek.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/28516375968.pdfIn PDF document text
    • http://jonipifenukiz.mygamesonline.org/rubejel.pdfIn PDF document text
    • http://zifixoribe.scienceontheweb.net/mathematical_aptitude_questions_and_answers_free_download.pdfIn PDF document text
    • http://ribupisid.22web.org/what_are_some_applications_of_classical_conditioning_theory.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jusagi/20774448997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53f976a5-d8bb-44bf-87b4-9bb941d213fd/68313418324.pdfIn PDF document text
    • http://kulebosux.myartsonline.com/wagtail_tutorial.pdfIn PDF document text
    • http://besafetusupug.atwebpages.com/mitowudepivesezewuxase.pdfIn PDF document text
    • http://remosinidad.rf.gd/tatalaksana_meningitis_tb.pdfIn PDF document text
    • http://xijaxatob.epizy.com/46038424673.pdfIn PDF document text
    • http://weponigonimogo.myartsonline.com/sugipitono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf4cf51a-1e40-49bb-9f45-72d6d136b4bc/zoveduxekejevuri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72b1a6ce-18f0-4e6f-96dc-d5beb8aed1db/wekosivigavulubezi.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/ganisevudosuxisis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1095310c-da71-4fc6-951c-62e1005fd985/tenikunefitudumenugavu.pdfIn PDF document text
    • http://bukogog.epizy.com/63017525456.pdfIn PDF document text
    • http://fexewon.rf.gd/26717405073.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_off0000bf4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF4C 5844 bytes
SHA-256: b190e43e07ba3b4901a83e8cb76c2b197bb62104c6ecfd2b82fdc141b9cbce87
font_01_sfnt_off0000d245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD245 12636 bytes
SHA-256: 55110fc997881d145f6c45a96701d845a30c7ba7eb8a035a2b86d52cc479d799
font_02_sfnt_off0000f9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CC 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.