Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe9bb2e3e5d5e08f…

MALICIOUS

PDF

32.6 KB Created: 2020-11-03 20:43:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a7394fd3845f6fe9cdabb3d907351301 SHA-1: 1159e5b7cfb16619f0857bab9d6c28053395cae6 SHA-256: fe9bb2e3e5d5e08fe29ad241b2ba648779b119c6033dcf0b4f618db5933153ca
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and 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 4

  • 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.
  • 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.
  • 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/aws?keyword=wmc+and+guide+and+2020 In PDF document text
    • https://pagofere.weebly.com/uploads/1/3/1/3/131398194/tubowa-zizuxugitelilu-dobaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5f8b5d9a328d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374518/normal_5f8ac31b4d250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382430/normal_5f8f8f9b5f097.pdfIn PDF document text
    • https://bilimetib.weebly.com/uploads/1/3/4/4/134435282/9297233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369643/normal_5f8dd13c061ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372987/normal_5f8c5050c7df7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_5f8b21dcb9acb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5f874f8e73113.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/d2ce3a3c-82a4-4291-8d16-cf965c4ce88a/wopoxarab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1d6973d-47ad-44fe-8ea0-3ff09c9a9f5f/xifaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a486ce9d-62d3-4ef1-9fe1-7c07ae7ef124/93089010929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cc0045f-5efb-4663-8c31-da93d5d4de4a/vovokaxarelubugajabun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/996a77bf-d7b2-4b2f-8b6d-da8105e5b7a4/janufuni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0f20b8c-7106-4c45-b540-a93077e90d2e/24584117804.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_off00004373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4373 5240 bytes
SHA-256: 6d0258fe3a3bb87b6b5979c87a46cf979a05b0a2f3f88960cdad272c8786ec77
font_01_sfnt_off00005545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5545 9484 bytes
SHA-256: e0ff88ee728f268a0160e60db5830ac0e08ea7fa93871052fa61a48ceda0176d

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