Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c5ad6689a0d0018…

MALICIOUS

PDF

79.6 KB Created: 2020-11-19 06:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6f9128a127ea543873014d31f669f8c3 SHA-1: 1de06a809bfddcf0ba9ae064408fee49baf2056e SHA-256: 8c5ad6689a0d001844c771b3a9a9631d1e7eff376529b82e3c87b2f531bf5ac2
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://traffking.ru/strik?utm_term=new+samsung+note+8 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371248/normal_5f93dff63c112.pdfIn PDF document text
    • https://vebifejelib.weebly.com/uploads/1/3/0/7/130775119/ragubijojun-mirem-foligegeg-savojagekojiwij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370057/normal_5f912245bb02b.pdfIn PDF document text
    • https://vilemanunopabom.weebly.com/uploads/1/3/4/3/134317174/xomexavujusiwusavisi.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/aa94aa7f99c.pdfIn PDF document text
    • https://lawagupavuraxap.weebly.com/uploads/1/3/4/6/134616311/495552.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/apollos_lyre_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc263609-8cdb-468e-bfd7-f86e50455a6e/in_cold_blood_persons_unknown_study.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab5f16d2-0442-48f3-8475-3444d095a5cf/the_four_hour_work_week_by_tim_ferriss_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/911bccef-fa6f-434a-937a-21208cec5371/bedagefefasafijawigepi.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/modelokirulimusupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/959cb7b9-4416-4ee1-b1ac-32ef569a2b85/xofiwugus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2732c97-b768-493a-bfc7-7c6a241a2a34/online_auction_system_project_in_jav.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5A 5132 bytes
SHA-256: 753df2827747b960f6a4c1f10963941256198806d8369573daa4bfc212262f4a
font_01_sfnt_off00010cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDA 10848 bytes
SHA-256: ee8cef485b649a67eff0ff8b8494d37216b883ea7066e908c0ddb68cf3d524cd

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