Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ca7320fd10b881…

MALICIOUS

PDF

75.5 KB Created: 2021-02-17 04:45:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6ce031c7ff24dfac7f9d3bf13015e2c0 SHA-1: 086ba9af96deed56ce246a8da9890b44ea7790bd SHA-256: e5ca7320fd10b881b4766e9e678e7f060b5183ff32510be009079424ab87e735
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document body and embedded URLs suggest a lure to a link farm hosted on disposable domains, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, potentially leveraging embedded JavaScript for exploitation.

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=where%20can%20i%20learn%20r%20language%20for%20free PDF link annotation
    • http://zubosoxi.22web.org/lg_g7_review_tom_s_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417315/normal_5feb73f3b05f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467571/normal_5fe63c5f1d6e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416501/normal_5fdda1d17891b.pdfIn PDF document text
    • https://cdn.sqhk.co/wepigosogo/gcRZjhH/top_10_2020_songs_clean.pdfIn PDF document text
    • https://cdn.sqhk.co/zarifabidit/f57mbjf/lofagamujewinanaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403823/normal_601f6f9f912c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488810/normal_5fdfd6414a0da.pdfIn PDF document text
    • https://poximixej.weebly.com/uploads/1/3/0/7/130776069/be36d2e.pdfIn PDF document text
    • http://lewodozena.22web.org/11669947058.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405907/normal_5ff15d3a1904d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384318/normal_600f8ddc3c6a0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fasemejatafa.rf.gd/18653119597.pdfIn PDF document text
    • http://zerebemenun.epizy.com/cipd_learning_and_development_report_2018.pdfIn PDF document text
    • http://likijanima.epizy.com/rozijekejekorowexume.pdfIn PDF document text
    • http://sojoramuf.epizy.com/42861486380.pdfIn PDF document text
    • http://jutebef.rf.gd/10386158955.pdfIn PDF document text
    • http://wetetepipemo.rf.gd/36059344208.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_off0000e8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A3 4976 bytes
SHA-256: 9cf463a0d63c96c1e93144cae544b854d9c2fc99c2a4ccd6ec7f003b53a698c1
font_01_sfnt_off0000f9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A1 10860 bytes
SHA-256: 8b8b2b78bf3d566a590487162b8186edf490ffe14e289fb4c20994315d2b9798

Open this report in the interactive analyzer, or submit your own file for analysis.