Malicious PDF — malware analysis report

Static analysis result for SHA-256 54541b5d750607ea…

MALICIOUS

PDF

65.8 KB Created: 2020-11-25 23:22:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 96a92d08ab4e271f70b26695d650d26e SHA-1: bc1cdc8366ec65cd35a28d3d3d2badb797a624dc SHA-256: 54541b5d750607ea843603777ae2b58550a4012700725a0b69fed54f78de2235
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO poisoning attempt. The embedded URLs likely lead to malicious content or phishing sites, aiming to trick users into downloading further payloads or revealing sensitive information.

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://trafffi.ru/strik?utm_term=skills+worksheet+reteaching+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426423/normal_5fa8278bd05b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444113/normal_5fb6a944ba5d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393624/normal_5fa5e12f6451c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375206/normal_5f929551b8624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411001/normal_5fb340dca4e4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381738/normal_5f8d2ea522c16.pdfIn PDF document text
    • https://tadurefejixuset.weebly.com/uploads/1/3/4/4/134498676/9099729.pdfIn PDF document text
    • https://rozolabo.weebly.com/uploads/1/3/0/8/130814594/2867588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_5fa7f2a66e14d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402294/normal_5fa23576ab459.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379049/normal_5f99349c392ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426701/normal_5f9a490b5bd9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f8759ca3b919.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378155/normal_5f901b0991631.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/799ad60b-05a0-48a7-836b-b66879b70412/medifojatemikedalasim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a85eccc-b3c2-45bd-90fc-38e5798a6aeb/80983453492.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 6

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_off0000c529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC529 5424 bytes
SHA-256: 3dea18e665b7e7839ce83b75608dcb8ecdbbf3038826ce774ebedc413641d950
font_01_sfnt_off0000d7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AD 10152 bytes
SHA-256: b6771071c1a26018af99a5b1f11c6216733fdae2b65fe481b912a4361d5d24a8

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