Malicious PDF — malware analysis report

Static analysis result for SHA-256 934670c61103301d…

MALICIOUS

PDF

67.1 KB Created: 2020-11-14 22:06:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8b91deeb7fc3d5a4282b0bf3112d0803 SHA-1: 3fcc978bfd3e8f87e7d3c8796721564cb4ca45b8 SHA-256: 934670c61103301d07ab837dd7278ca037acb7c83f97137803d7c375674610cc
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=tatuajes+de+rosas+en+el+hombro PDF link annotation
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/2022f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f8c15c2ad347.pdfIn PDF document text
    • https://mosovokiz.weebly.com/uploads/1/3/4/3/134333023/nekazuvunazem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403816/normal_5fa9ca9306eb0.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/6696937.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/85341b53-be93-4157-9f25-cb21f2f18fe4/634492644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c09e6ed-ecd1-4b55-8e11-846960faeab7/tetita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab5b0a72-0d12-4ca1-8b44-0b9dfa9b7843/nimutonozadegipifig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b49133c-4bdc-4528-8975-0ddec3f72669/93086032478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ce8fd1b-12d0-4568-92fe-9139fd08a27f/36114909537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8942af2-0477-472c-9024-7ee9d9b154b3/langstroth_beehive_building_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/easy_clash_of_clans_hacks.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/wotlk_level_guide.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 3

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_off0000cbde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDE 5228 bytes
SHA-256: 93000cf6da4ac2e2f24cf0f98e174d69a17dea19f34463d0220e0b4b1cb90c03
font_01_sfnt_off0000dd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD72 10076 bytes
SHA-256: d4c79bb4c71712de3ffdf1ef0d16d1e813d715a25a7918c00c20e4b9b899f104

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