Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d059e3d0291721c…

MALICIOUS

PDF

86.6 KB Created: 2020-11-24 02:41:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4caa3fbbadb43f298f18538d24e13424 SHA-1: 1fa80359dcd00cc56c3b1bfcc5dd7bfdac99a59d SHA-256: 9d059e3d0291721c6c24d0ca3a2034b7a97a87b74849592c4e42e83e200d3517
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 0.9997

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=smash+ultimate+tournament+legal+stages PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447278/normal_5f9effd9f0d8e.pdfIn PDF document text
    • https://domamulobam.weebly.com/uploads/1/3/4/5/134527142/fumoxovapebunupelo.pdfIn PDF document text
    • https://fuwanitawoge.weebly.com/uploads/1/3/4/4/134436239/8764222.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/e2ca6f0b-55c9-4adf-ac51-fbef177f8dbf/diliporefikesomudawevazaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df8e39d5-1acb-4e6b-a169-c9369e83abac/rolumewobebarik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e9eb9d8-7ccf-4ffc-9df9-09c584e1bf89/mulajujofegugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b945d4aa-8705-43f5-9bc1-0c46122dc4f6/polopanimow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db51c31b-7467-4756-825a-ec7242405601/88020874092.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/gonalulami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c81fd8f5-85c3-4298-a99a-b927606484c2/chainmail_game.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/medusa_soul_eater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f75bd80-fe36-434b-8922-9286d09ccf13/58754353317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d573c122-3829-47e0-b88c-38713a1428da/offline_tivo_update_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ee1610b-aed0-495c-b233-cd877bd4e443/kajinufizo.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_off000105d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D7 5084 bytes
SHA-256: 3c667af826b213aae4f37985a4ca18d35e760581e5db6cc1e1aa000e4ad8a178
font_01_sfnt_off000116ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116ED 12224 bytes
SHA-256: dcebfc3b116f509cc895c75498da51157d8909abab2a63be9f1b0ba099386fca
font_02_sfnt_off00013f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F95 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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