Malicious PDF — malware analysis report

Static analysis result for SHA-256 4efbc863e1aad412…

MALICIOUS

PDF

79.6 KB Created: 2021-05-17 21:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d10ce8f7d839ba4aa93119b6166bfae SHA-1: d0aa5d1fba19d6944943d38405f10233de3592bb SHA-256: 4efbc863e1aad41272637b8172f1e661fbce1c6e058e8c2b80b89bd3a4517f5c
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that lead to suspicious domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall detection by security tools point towards a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://nipisod.ru/strik?utm_term=sonru+bluetooth+5.0+transmitter+receiver+user+manual
    • https://xidamosu.weebly.com/uploads/1/3/4/7/134707329/1564146.pdf
    • https://static.s123-cdn-static.com/uploads/4381756/normal_5fde0af22735f.pdf
    • https://kemovovem.weebly.com/uploads/1/3/1/4/131408999/ee3e7cd44ec9.pdf
    • http://wurenuzuludesu.22web.org/agrarian_reform_cooperative_definition.pdf
    • https://static.s123-cdn-static.com/uploads/4378605/normal_5ff5e2e99f0df.pdf
    • https://static.s123-cdn-static.com/uploads/4483608/normal_5ffb8d67a96e9.pdf
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/5964163.pdf
    • http://demegudatodura.iblogger.org/how_to_pair_weight_watchers_bluetooth_scale.pdf
    • http://dowuwomili.iblogger.org/88139712002.pdf
    • https://sopunarexij.weebly.com/uploads/1/3/1/8/131857112/f1f32561e.pdf
    • https://cdn-cms.f-static.net/uploads/4408586/normal_602b516dd8e6e.pdf
    • https://static.s123-cdn-static.com/uploads/4427514/normal_6005793956de3.pdf
    • http://nibumuxadata.66ghz.com/awareness_of_social_media.pdf
    • https://deguverafutaw.weebly.com/uploads/1/3/4/5/134501054/2626a9f8.pdf
    • https://gamuzajebi.weebly.com/uploads/1/3/4/4/134481120/2153842.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bewalixatama.epizy.com/britannia_balance_sheet_2020.pdf
    • https://uploads.strikinglycdn.com/files/be0895c8-637c-44bb-a18a-e4ae101eb6b8/jesupexikedijiwi.pdf
    • https://uploads.strikinglycdn.com/files/f7c32987-8aa7-4352-9c8a-65a50a406b50/xewaralewisewen.pdf
    • http://wotupirikelir.rf.gd/55630879126.pdf
    • http://jojukam.epizy.com/kabolipuf.pdf
    • http://fanezetejigu.rf.gd/advanced_excel_formulas_2020.pdf
    • http://zenujilap.epizy.com/90927375742.pdf
    • https://uploads.strikinglycdn.com/files/9ca9b00f-58b0-4c3d-9885-524f1cc4d765/honda_135_outboard_service_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f81b.bin
255f009ae3e76b0e16e27d5b603385891511516998ba160a5b65556fe3172d1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF81B 5640 bytes
font_01_sfnt_off00010b26.bin
33b3eaa213f14540d4686e8cb613275e202cde8cd7517ba18e38af7793f1aac5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B26 10920 bytes

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