Malicious PDF — malware analysis report

Static analysis result for SHA-256 23d6d573d7aca7e2…

MALICIOUS

PDF

75.8 KB Created: 2020-12-28 08:24:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bb8ebc300bc0ee272e1ff5b0389301f9 SHA-1: bcd6b5d225d334bf55ecc8d393ee2c243ee411e5 SHA-256: 23d6d573d7aca7e2b5568f223cf7e55376e1f8576b688671defe8d78d1b1136d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation scheme. The embedded URLs likely serve as lures to redirect users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://trafftec.ru/strik?utm_term=frog+ninja+spider+superhero+games+gangstar+vegas PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384325/normal_5f984f8ab26f5.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/mebugow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390642/normal_5f98ee279b14f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410954/normal_5fab3bac5125e.pdfIn PDF document text
    • https://gidibaxatum.weebly.com/uploads/1/3/4/8/134889182/zogavawejozosu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489414/normal_5fbec2c6916d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383692/normal_5faae014e4841.pdfIn PDF document text
    • https://xadixifiv.weebly.com/uploads/1/3/4/8/134888816/kosizimel.pdfIn PDF document text
    • https://vuworuvadile.weebly.com/uploads/1/3/1/6/131637376/4995048.pdfIn PDF document text
    • https://zugozoriv.weebly.com/uploads/1/3/4/7/134770463/3058342.pdfIn PDF document text
    • https://sopoxovolofu.weebly.com/uploads/1/3/4/5/134509961/1433663.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495251/normal_5fcefc8f688c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451355/normal_5fa796fe36cf7.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1392291.pdfIn PDF document text
    • https://cdn.sqhk.co/leburogutu/fgdghiB/955426990.pdfIn PDF document text
    • https://cdn.sqhk.co/filomada/1VkjbZ9/parekunenimawikugeve.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/0d44c393-0659-47f1-b88f-743569b75715/basketball_stars_gamepix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94830322-7e3d-4aaf-9c3b-ec17e4b70ed4/aspen_south_colonie.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_off0000e8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D7 5432 bytes
SHA-256: d1e433b678c6792b4e422a0a2a2e95bd6c36a38866542cf5bcc3e386d2717fe6
font_01_sfnt_off0000fb3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3A 11312 bytes
SHA-256: 6cfd4dab3dde865f9df10378e6eda23cdc93e2584831285357a7bec3132de1fa

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