Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bd25f84e91b39d3…

MALICIOUS

PDF

67.4 KB Created: 2021-02-17 21:13:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: e6e99350ff680d559a610a39faa4def2 SHA-1: 47eefada2e69092dcab63a945875669eef83d310 SHA-256: 8bd25f84e91b39d3964c6aa5bb740528cc0013d747cb9b949cdb17c2921b72da
104 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains an embedded URL pointing to 'https://bologen.ru/wix?keyword=psiphon+100+handlerui+apk', which likely serves as a lure for downloading software. The presence of a 'download button' heuristic further supports this phishing or social engineering attack vector.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=psiphon+100+handlerui+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370317/normal_6015feab2b944.pdfIn PDF document text
    • https://cdn.sqhk.co/nuponoviva/fjfjjhe/kojusoko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427781/normal_60087bb24bf75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390664/normal_5fcd0daecdaf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455174/normal_60121814bd0c0.pdfIn PDF document text
    • http://reduslim-sito.site/socrates_philosophy_of_educationz4q6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404529/normal_5ffec42785ad7.pdfIn PDF document text
    • http://nipokafusili.iblogger.org/15984736912.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464734/normal_5ff4c5160f1f7.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/wexukufedepim/fosabaf.pdfIn PDF document text
    • http://zivuvosiz.epizy.com/us_gaap_depreciation_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/90859982806.pdfIn PDF document text
    • http://nefigubisi.epizy.com/wijenaliranopux.pdfIn PDF document text
    • http://pinakebe.rf.gd/vizib.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/kjv_bible_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/claymore_manga_volumes.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_off0000ca72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA72 5308 bytes
SHA-256: 672d719503df652ae2c480fe3eacd57119cf1aafe02d12c5b4f636dff4d9295b
font_01_sfnt_off0000dc76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC76 10720 bytes
SHA-256: 08f014bd41ca5a2a112691cda63aa2cf7f77b577c4772228558688908bed5f49

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