Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c80e38eaba09d5…

MALICIOUS

PDF

42.4 KB Created: 2020-11-04 09:06:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b30996306bdd7ed88fa6c835837916cf SHA-1: 2dee5e64410ab549ab67731b44c90b35c3f85a97 SHA-256: 47c80e38eaba09d5671a57e6f5b32d948f008345164014fdd53cead81e69ad59
94 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 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://gettraff.ru/aws?keyword=minecraft+unblocked+66+at+school In PDF document text
    • https://cdn-cms.f-static.net/uploads/4449402/normal_5fa23dc64d42d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376610/normal_5f90bce4a1554.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415331/normal_5fa1f39db271d.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/5a53bb77-b917-4a01-b212-348d9ecdf643/gogujiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d7bb30a-360d-454f-9a44-059b7ce8f7ae/11536635310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff3f5cf-f595-425a-863c-6f69f094bb81/mibunabomitavef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/595ed9bc-c3f6-4140-9a73-162b8c112985/zubopesegepivosuzaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61f3f629-0043-46cc-85b2-a025e2330fd1/50687550513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b2931d4-3b30-494a-9fd0-45286f2c2d1d/lapokiloki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2ad9f21-5e5c-49bb-a285-7c8d9c7f70ae/grant_wood_the_birthplace_of_herbert_hoover.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/56232012780.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/natoxem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84b554fe-cc70-43f3-9188-98441bf89817/thank_you_letter_to_doctor_retiring.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a704159-6741-46ff-aa60-24f4bef64c40/work_power_energy_worksheets.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_off00006914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6914 5472 bytes
SHA-256: 99de1d6c04a1b992fb2bdcb8b3bc0c68a4da26ea372ba3696e6772d374914733
font_01_sfnt_off00007bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB4 9700 bytes
SHA-256: e0396ef9fa23cc41ab67b807e10d89846d0722c4b737a97ab010c760d7f547d9

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