Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c3d2c0d35b4233…

MALICIOUS

PDF

30.0 KB Created: 2020-11-05 18:49:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ab58ec820db7ac5bc8d9075af919bbb8 SHA-1: 2cee4df7ccaf21f0d6f315a6e7d3620d7e463256 SHA-256: 09c3d2c0d35b42330a51d4098c6150eb3b53882378d9ed70b6832ae507465f88
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF is identified as a malicious image-only lure, typical of phishing campaigns. It contains a clickable link disguised as content, directing users to `https://traffset.ru/123?keyword=the+rainbow+fish+pdf+free`. The document also hosts a large number of external PDF links, many pointing to S3 buckets, suggesting a link farm or a mechanism for distributing further malicious content. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 30 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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=the+rainbow+fish+pdf+free PDF link annotation
    • https://radutarogo.weebly.com/uploads/1/3/4/3/134379411/kiputoxaje_gezipanor.pdfIn PDF document text
    • https://kifobanirijo.weebly.com/uploads/1/3/4/5/134595275/2347902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415070/normal_5f9635214b9f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f8714a65a9f9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bagisi/finulunotureronewugek.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/nafafikubedobat.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/children_s_activity_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/zifaseludowitasonimotibex.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/lulugidazoramak.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/black_diamond_cosmo_headlamp_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/getupubugojamimate.pdfIn PDF document text
    • https://s3.amazonaws.com/gupisi/hyperstat_guide_maplestory.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_off0000406b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x406B 5276 bytes
SHA-256: f610232927ef9e1c8820a083273b0f5ac201ad6de8edd541776a9985d67a1de0
font_01_sfnt_off00005262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5262 7400 bytes
SHA-256: 486197c5ce3a6a5cc1e952cf348f0a811e29322176ab814eb708129e3ac9405d

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