Malicious PDF — malware analysis report

Static analysis result for SHA-256 470081dc49a9a553…

MALICIOUS

PDF

40.3 KB Created: 2020-10-05 23:16:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 66931d36f4966366603a022d3eacf609 SHA-1: 6a275a4eb8600ce695cc5dd963fca58a5f22f333 SHA-256: 470081dc49a9a553497275f44e2562e4037dfe3e73c9d3a6cda0bad88820054c
94 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to a theological study guide, which points to the malicious URL. The ML classifier also flagged this PDF as malicious, increasing confidence in its malicious intent.

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/strik?keyword=wayne+grudem+systematic+theology+study+guide+pdf In PDF document text
    • http://nakim.livewellwithkell.com/uploads/1/3/0/7/130775903/wefubemajojaka.pdfIn PDF document text
    • http://lozimuno.contributewater.com/uploads/1/3/2/7/132712324/9e57eb.pdfIn PDF document text
    • http://gojikozi.mededmasters.com/uploads/1/3/1/4/131437812/lijirabikesege_zegor_murixuwipanef.pdfIn PDF document text
    • http://fuzolevo.falafelcafe.com/uploads/1/3/0/7/130775705/solivowekale-xodusugonanivow-tofizabewudiko.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/be511a26-9e78-4a37-858d-431da95563c3/fetujixovewilegexuwaxamex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75d77915-c079-416e-ab16-f4b0ddfd6407/ratetidesojitajakufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3abbad33-b80e-4c75-9c9d-1217d3fbfdb9/vapid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16e21d08-2141-4db9-b13e-56acbd682312/kenawitod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bef73930-fb7e-42dc-8de1-49f7fbb6afe0/94959490616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ef60512-82b6-40c1-ab37-b638f027cded/fuxemosaxadapokavemeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4155f535-fd4b-4eab-9a44-54210966bbd9/78398727445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8181/3154/files/weddle_elementary_school_supply_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5795/5494/files/betexikumelegepufij.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_off00005e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E81 5684 bytes
SHA-256: 3fd83e9e54f4dabd5ee7751442dd5e40e9b2a9413ee91a53ca7582a0fa3f71bb
font_01_sfnt_off000071c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71C9 10008 bytes
SHA-256: 4107f67badfa96729ad9523e73f36fe6ad425445304ea15f6c4ae1a27122f9b0

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