Malicious PDF — malware analysis report

Static analysis result for SHA-256 71b17ae6cc986677…

MALICIOUS

PDF

85.0 KB Created: 2021-02-26 21:29:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f7206fe7b3c413733237b249e0e1ad5d SHA-1: 59fb75fee42b1c742289c63d8684974e69b38fad SHA-256: 71b17ae6cc986677679eaa657d4e0bf3255f6e6e7cc4e217734fe7338ba4d9db
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing lure designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=how+to+hook+up+sharper+image+wireless+headphones In PDF document text
    • http://jerijoba.iblogger.org/tazesemodikawozojoluz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382952/normal_5fe1ce47494f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465690/normal_60117f0f6cf8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449395/normal_5ff1642d1fcd5.pdfIn PDF document text
    • http://namedaun.fun/heroes_war_counterattack_com2uscil18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471455/normal_602e324a3131d.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/gidifk8/konowofiburalavilabibaxom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463812/normal_5fe31f32f1eae.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/liwafo/bitexco_group_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/tamil_play._com_2018_hd_movies_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/filasojajoja.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/fivomu.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/kelujukesomozo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDE 5488 bytes
SHA-256: 75d2db1b4cc4cf9064e82a8d570ce497d60a9c9a165a2dc04b3230d5558b91c4
font_01_sfnt_off0001226c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226C 10540 bytes
SHA-256: c27b477a6c17f450d6d583a1b025a3127a87d488377da7a6d6970a81ea5e3e43

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