Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eaf9aeb8290c042…

MALICIOUS

PDF

75.6 KB Created: 2020-11-22 15:40:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 94cd57e6be01f6bd2d5ad5f94b09b3e6 SHA-1: d77445e3bb457c1a994c9f3cd583a87f7bd3cd59 SHA-256: 3eaf9aeb8290c0427364af144763b422c842519e4451d5af13212532f5809e3f
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?utm_term=plug+in+air+purifier+as+seen+on+tv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369160/normal_5f9146b60e770.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/sofunolofokex.pdfIn PDF document text
    • https://gojenegitoz.weebly.com/uploads/1/3/4/3/134387591/2723346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459654/normal_5fba1fce1e76c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491925/normal_5fb2896f3fd64.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/81d1aaf6-0dd8-48a3-af92-3dec55713a17/spiderman_homecoming_pelicula_completa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2eb0cf5-cbd0-4e13-a002-9b99fb9e6405/gewojaxapugori.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/72311966206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc6d3119-0b88-40e1-b4be-262fb347cb3d/39317767208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fba27dd-1c29-4287-a371-1d3e012405f9/78428541874.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/expanding_horizons_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54aa5d7e-a14f-4d16-aadc-70fb6a4865db/the_quest_apk_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/214f9798-7dd5-458c-94ab-ed7f9accd3b7/vapipupexobo.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 4

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_off0000ea57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA57 5132 bytes
SHA-256: adef97a2d1ffaaa583cff67d5e67bb07d438828a85a11aa4632145c20682a202
font_01_sfnt_off0000fbe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE9 11044 bytes
SHA-256: 909d7ca7610ef73565cef8cc4e6a8989aaec855d07715394e13cf07b075e67e0

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