Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b694e3117cb232…

MALICIOUS

PDF

76.8 KB Created: 2021-02-20 20:24:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2f9f9b1acdd048795f4fc3b3bb4ba171 SHA-1: 019e6cf4121f579d0885789320e1270b221aad41 SHA-256: c0b694e3117cb2328b0c2eda0b2e007b0e8e81fe83714aee19fe26c50baffbf0
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://maypoin.ru/123?utm_term=gold%2527s+gym+xr45+review', which is a high-priority IOC. The heuristic 'SE_URGENCY_LURE' suggests the document uses urgent language to prompt user interaction, aligning with phishing or malware delivery tactics. No scripts were extracted, but the PDF structure and embedded URI indicate a likely attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://maypoin.ru/123?utm_term=gold%2527s+gym+xr45+review PDF link annotation
    • http://lisexodufebe.22web.org/44665246151.pdfIn PDF document text
    • http://puveduxorapuba.iblogger.org/que_es_el_recreacion_educacion_fisica.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495043/normal_601a2a016458f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471481/normal_5fdd86212f246.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492871/normal_5fece6517261c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449181/normal_6003b54fba452.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492529/normal_6005bd6c793a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468259/normal_6000075f592e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zasegusof.epizy.com/vcenter_client_6._7.pdfIn PDF document text
    • http://wezexezawudev.rf.gd/squarespace_ecommerce_templates.pdfIn PDF document text
    • http://vufagozujidivu.epizy.com/vitok.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/28636315817.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_off0000ec66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC66 5532 bytes
SHA-256: bc88d19814b4d4d2de98aad632db0633885522fd7a7d6fe0f8e3d15f5cf1a307
font_01_sfnt_off0000ff55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF55 11632 bytes
SHA-256: 8dd02b0da94e181d72b046b6a73bda3968bfd29702a16c85a72c763350fe5648

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