Malicious PDF — malware analysis report

Static analysis result for SHA-256 c692dc04cbf0cd2c…

MALICIOUS

PDF

72.8 KB Created: 2020-12-01 20:12:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cfd9ce20346963abede7bf89556e2513 SHA-1: 2eaef5f5bb52768ce31dbfaa2779f8c4bfc585db SHA-256: c692dc04cbf0cd2c26ba5a883d484192695d081993c4af7667f9fb9c09521bad
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffnew.ru/123?utm_term=ffxiv+bsm+leveling+guide PDF link annotation
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/wuxiz.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/mexesazaxasa/sawowisigeg.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf5a629c5e26690253e6e/1606219176777/crater_lake_winter_access.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36b9bcd1e280355e43c7b/t/5fc55a7508845d09243d0f94/1606769271752/california_substitute_teacher_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/domedadunijupezabofalupi.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/38859552614.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/football_match_highlights.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/python_for_ubuntu_14._04.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc38cee68612547ed6ea9f6/t/5fc6010fe18c5c478ec97fa7/1606811921456/ranewu.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/accounts_payable_interview_questions_and_answers_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/arsenic_and_old_lace_play.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3392173fb5383b6cd645/1606300563457/ecology_analyzing_predator-prey_relationships_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4374da3a-413d-4761-bbf5-4125969f70aa/xexolenusokubifanutipikoj.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_off0000d1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B3 4836 bytes
SHA-256: 464bfff55803322c014b03afc7c1ba261efcd8c56aaca8c93315b93b13761f31
font_01_sfnt_off0000e211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE211 11320 bytes
SHA-256: 7a691c65d1f08500aab2301b3dad861517fc4f65cf0d31250228243dbb732b34
font_02_sfnt_off00010898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10898 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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