Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3a5e04c4cc574a5…

MALICIOUS

PDF

66.2 KB Created: 2020-11-22 00:33:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3f0e533064e1ca004372522bf1bee25b SHA-1: 259d52e55b2793ed5167ce92a89fbddc5d56b5a3 SHA-256: c3a5e04c4cc574a54df0ff98cb7e8273472dcc4de2e4b55360d43fc4bcf9318e
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://trafffe.ru/123?utm_term=ti+nspire+cx+cas+teacher+software+keygen PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379720/normal_5f958c1edffdf.pdfIn PDF document text
    • https://xazojitov.weebly.com/uploads/1/3/1/4/131408465/simimadifos_natukofuduba_lariraxigezige.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413570/normal_5fa41ef494223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f881432e0480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389805/normal_5fa6fb791044e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384028/normal_5f8e57bb05029.pdfIn PDF document text
    • https://xutetuzaxudekit.weebly.com/uploads/1/3/4/3/134371691/pugilafenetevurosuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375070/normal_5fb4f6840a63d.pdfIn PDF document text
    • https://mipekemodowopu.weebly.com/uploads/1/3/4/5/134584650/xubiwajejer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403537/normal_5f92f5595a354.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/a7a0be91-4890-4915-9431-aaacedd3215d/97094788525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b066a5b-a8b2-4997-9e82-4068bb56ac47/sefizefubara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cfa76f4-cfcf-4503-aabc-70f35f7a27cf/43455965669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ab39ff4-2c96-4faf-b13c-03fb3f958ea3/ap_research_sample_paper_medium_score.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_off0000c584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC584 5520 bytes
SHA-256: ba4fe10dcbcc546bad716e0810aaf3aaa474b1515f301fdce9d2d3925899440c
font_01_sfnt_off0000d866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD866 10424 bytes
SHA-256: 11ec90a22a3e2e930bdc7c45463b9f56864ae343efc38775d261d258c024cd2e

Open this report in the interactive analyzer, or submit your own file for analysis.