Malicious PDF — malware analysis report

Static analysis result for SHA-256 0edd88e62a073d47…

MALICIOUS

PDF

79.4 KB Created: 2021-02-21 10:52:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 30b20d43c4b63dcaab57c8b3fb4c62df SHA-1: b6bed1febeed9f270abeadaff0902357f72edfec SHA-256: 0edd88e62a073d4709c9286bf1e6e67a3ad38b974662caff1254c736ad8acf80
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to other PDF files hosted on disposable domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to lead users to harmful content.

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 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://bologen.ru/wb?keyword=norman%20vincent%20peale%20power%20of%20positive%20thinking%20video PDF link annotation
    • http://dedekuwetom.iblogger.org/ashnikko_hi_it_s_me.pdfIn PDF document text
    • http://erethiztzj.space/neufert_architecture_downloadhadzu.pdfIn PDF document text
    • http://stingeksoj.online/how_do_you_heat_up_frozen_tamalesw3ett.pdfIn PDF document text
    • http://file-id.ru/mijedamitumalubitaxudamhluo.pdfIn PDF document text
    • http://webcam-model.online/85704657074hqaht.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/nuwexexocm3po.pdfIn PDF document text
    • http://sepotutudi.iblogger.org/85005569269.pdfIn PDF document text
    • http://dhl-order.info/gagexisugelip7f0f9.pdfIn PDF document text
    • http://simultaneously.space/msi_z87-g45_gaming_manualu2lj3.pdfIn PDF document text
    • http://bigmagazin.xyz/nofefi9o7co.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zapofekeba.rf.gd/37115143091.pdfIn PDF document text
    • http://bumosutu.rf.gd/7706838156.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/20805522812.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/48306330285.pdfIn PDF document text
    • http://lidikulogape.rf.gd/emergency_medicine_doctor_job.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/dovolapelu.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF7 5544 bytes
SHA-256: d225cc1a584d08fc6bf7e0dac9b03a19b0b7e06de5450ac89de2dc4ae14630d2
font_01_sfnt_off0000fdaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAF 10516 bytes
SHA-256: 600f7af3d98c44479b7412609dd5c8f67e7fff06547a84351453c1a63fae7218
font_02_sfnt_off000121be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BE 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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