Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ec2f5be68c9a46…

MALICIOUS

PDF

82.3 KB Created: 2020-12-10 09:33:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 10a9876af40d3e4482b400ccecb6e479 SHA-1: 2030f5961a2bf3ace1488b627262622516f4393d SHA-256: 90ec2f5be68c9a460ef2c2c76e43bb1d9267edb07af2a1829d1d76fcf910c82f
156 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 ClamAV and 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 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/strik?utm_term=ravenna+middle+school+phone+number PDF link annotation
    • https://fukoxifixe.weebly.com/uploads/1/3/4/4/134460993/60defa76753053.pdfIn PDF document text
    • https://nigafabap.weebly.com/uploads/1/3/4/3/134377596/dugawuluxo.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://uploads.strikinglycdn.com/files/bd93163a-4318-4c4f-968a-abd386dfedab/f45_workouts.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79396d2523e4b70c2aa72/t/5fcd383d5177ea328ccd9484/1607284799069/lunutepifuludijobegilod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2bb1fde-fb39-4a38-907d-c072495379ce/18653377585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b67d1ccf-624e-4485-9d98-e6f2ae2de640/votivawojuwadixizafigopow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b69923d-0760-4129-a3ad-dadb878daf86/look_for_the_silver_lining_lead_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28a32618-5a15-4cf4-92b6-7c556c608d21/loose_leaf_tea_direct_sales.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e9e3bda9c57a97be47bf/t/5fc14768f81c9a2a0cd122a4/1606502253283/decision_at_thunder_rift.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88508573-8d7c-49ce-8676-5cbd9b5747d8/san_miguel_academy_of_newburgh.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0db63570fb44d1ca8f8a/1606290876267/moto_g7_supra_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11a9884e-1773-4468-9f68-c8f50b957a3d/pineville_junior_high_facebook_page.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91917087-da74-4b4f-9621-96167fef9189/levixameliv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a04da8-3324-4dad-be93-d9d4c480e5a5/20_bus_route_hastings.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_off0000f979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF979 5320 bytes
SHA-256: 91a5578273f9796b7ca1a27fe0ab30cf641de50639a106c4afb4dc988e254360
font_01_sfnt_off00010b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4F 10340 bytes
SHA-256: f026f45ea649806d3a55a40f63c84279199e67164157eef7ee4606e2f2e5d864
font_02_sfnt_off00012e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E8F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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