Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a6a46e4a5554aa1…

MALICIOUS

PDF

69.0 KB Created: 2020-11-17 07:49:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 53469c11125b05bf7cb2040a9fd3fcf9 SHA-1: b8ec1818ab19ff49c0df9ce2f7e09cacd7f62dcb SHA-256: 1a6a46e4a5554aa1dc8af758f50c2c46993627ed376d3707c4505d97858673bd
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=ejercicios+de+fracciones+4+grado+primaria PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392193/normal_5fa464988b60f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368956/normal_5f88ef585f462.pdfIn PDF document text
    • https://jokepalebaja.weebly.com/uploads/1/3/4/3/134360350/dc7ed99e98831c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374682/normal_5f8ab2f1d9249.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f98d37dc1d8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383314/normal_5f8dcc4141e18.pdfIn PDF document text
    • https://jutoduxozerepep.weebly.com/uploads/1/3/4/5/134599773/1530722.pdfIn PDF document text
    • https://dexixafavako.weebly.com/uploads/1/3/4/3/134348567/33398468e10740.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/3b1a0e98-3abc-4e35-85de-350a1ba4e56c/dil_hai_tumhara_full_movie_with_english_subtitles_einthusan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab2def17-f662-4eb2-ad41-2889cb677c7c/wukikezelupexamefun.pdfIn PDF document text
    • https://s3.amazonaws.com/legolikagamop/24688304328.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d15621d-4ab9-4bcf-8a0c-e61e12d1eea0/65246133302.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/39974408297.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/happy_wheels_apk_download_kindle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b4383f-43bf-458e-bb8a-1b830a4ff4c0/88559660697.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_off0000cac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC7 5564 bytes
SHA-256: 4829dd77da97a1cae26a29e82b85b00a29c4087f093a24f2d9650c688bce11c4
font_01_sfnt_off0000ddb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB6 12136 bytes
SHA-256: 949f2961e9514e4688f0b1eb3c52ada381844651496ab657f01fc4e0c0bbd838

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