Malicious PDF — malware analysis report

Static analysis result for SHA-256 c910c9372bfa7bda…

MALICIOUS

PDF

69.5 KB Created: 2021-02-12 08:25:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4dc8a6bcafedc17315bb02b4ae65d999 SHA-1: 3cd4e50347eec26c7491db81533ce98c220ce34f SHA-256: c910c9372bfa7bdad1ffd15466376ba5083464e4f5c14fb1dedcd1f60893ef6c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains an embedded URL pointing to 'bologen.ru', which is likely part of a phishing campaign. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=mafia+romance+books+wattpad PDF link annotation
    • http://zzzmmmmejjj.space/2783050484oxxbx.pdfIn PDF document text
    • http://heartcenteredequestrian.com/sazasetasure3trij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404105/normal_6021bd974cd74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421944/normal_5fe4f263b9f16.pdfIn PDF document text
    • http://nosinoski.shop/14594004100nvmgd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388169/normal_601a1729e53d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389601/normal_6011dd8dcfb03.pdfIn PDF document text
    • http://bachanalytics.com/identifying_sentence_errors_exercises_with_answerscftgp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454984/normal_5ff8719de9e83.pdfIn PDF document text
    • http://ketrovk.xyz/591093015846j99v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459034/normal_5fdf477b971eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476285/normal_601dbbb4f36e5.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/datarofapakil/mirag.pdfIn PDF document text
    • http://mepigaruvuj.rf.gd/sozewegududezoba.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/fedolij.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/54885243337.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/posupotepizawijeb.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC54 5568 bytes
SHA-256: 7ee133fb24dbe899633aa77104a40b5cf4052b5557fcbd0f6401df5e89d9c21e
font_01_sfnt_off0000cf4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4E 10248 bytes
SHA-256: c230ea983fe0d1e0df759d686b1e861b1e774939969e4a62977d19a4c8a6ebda
font_02_sfnt_off0000f2c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C4 16324 bytes
SHA-256: fb06eb7d986338c63a3294410ca24b8c1ba81c5c1986406d8c919d7e3a606d06

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