Malicious PDF — malware analysis report

Static analysis result for SHA-256 e910d65fb4c93eeb…

MALICIOUS

PDF

73.2 KB Created: 2021-01-15 21:35:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 244584be3fe2f544a55db63f84cce9e2 SHA-1: bfca251b8d8e60645d0e5933c106c934ec0992bf SHA-256: e910d65fb4c93eebc4d02dc52a1752be82ec3a9b8c59f59350117e2370972537
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL `https://traffnew.ru/123?utm_term=scale+factor+problems+and+answers` suggests a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect the user to a malicious site, likely for further exploitation.

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
  • 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://traffnew.ru/123?utm_term=scale+factor+problems+and+answers PDF link annotation
    • https://site-1216718.mozfiles.com/files/1216718/electrocardiography_for_healthcare_professionals_3rd_edition.pdfIn PDF document text
    • https://dubitofux.weebly.com/uploads/1/3/4/4/134458445/fopetaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5fd26d1f25651.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369174/normal_5fc85f89bf05e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368781/normal_5f8a1e2a877df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488817/normal_5fb3c59ba7f65.pdfIn PDF document text
    • https://riwubabefos.weebly.com/uploads/1/3/4/5/134591520/42bd651598c894.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/ja9jf29/6741026501.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420019/normal_5fbbfd837df86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498404/normal_5fb5a92de9668.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410217/normal_5ffb20c2581ab.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/ijdhgic/82630217778.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466662/normal_5fc9db34daee8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486982/normal_5feddeb172df9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472481/normal_5fa8ae995a96d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475391/normal_5fb4250c241ff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dfb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB9 5636 bytes
SHA-256: 5b1b4886d47a1dea037099e466110929d093c5d0603ebcb1e8b2587220178a89
font_01_sfnt_off0000f2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E0 10988 bytes
SHA-256: 8383472d7e71b2b9870dd8af719f07f05f2cc3d0d10f04f8f2201b0ee1651066

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