Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42a5a058976b5b8…

MALICIOUS

PDF

40.4 KB Created: 2020-11-05 17:44:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 1a92a47630ee43c79880b02ffa76dd2d SHA-1: 27b4b447bddd7c7f77257896668f8c4687451797 SHA-256: f42a5a058976b5b884e42d13ee03f2ab27e878b94992810206deb8bd51188358
66 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 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 1.0000

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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?keyword=lorex+edge+2+instruction+manual PDF link annotation
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/4331547.pdfIn PDF document text
    • https://jususisizeka.weebly.com/uploads/1/3/4/2/134266965/5761084.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/muganazaju_datezasasexipap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426073/normal_5fa3252a36484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384839/normal_5f968672d2b97.pdfIn PDF document text
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/1012737.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/xadiwuz.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/mikukinib.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/10d616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381544/normal_5fa3b50933ee4.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/025bfe24-6842-41d1-8cc6-12c81cf43bf4/vukasaxemametuwawimimiso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a0ac986-a654-4190-861b-8141726bb60e/jejesugekiwubanir.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/morphology_of_plants_and_fungi_bold.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/le_creuset_size_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 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_off00005ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA1 5400 bytes
SHA-256: 5fdbcef2dd979c846093bff58ec692717ed81719e42c2f389949ec2b0491ae4a
font_01_sfnt_off00006df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF3 11104 bytes
SHA-256: c23af44d1260e00a654c89422fbbc1f5174f4c0777cb8031ff8b895e5f6ed449

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