Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e57f5cc98f6a40…

MALICIOUS

PDF

187.8 KB Created: 2021-03-27 10:08:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4de8555ed0c8d47ed0867703566e46cd SHA-1: d757e1ac8f4452aa7282acc46ace0a53d9da8de8 SHA-256: c0e57f5cc98f6a40768b46556405a1d3d231a8640d9994064a181fe48f8910c6
104 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'seumenha.ru' and the 'SE_URGENCY_LURE' heuristic suggest a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://seumenha.ru/wix?keyword=nj+full+circle+high+school+rankings+2018
    • http://natlegend.space/the_developing_person_through_childhood_and_adolescenceir3zs.pdf
    • https://static.s123-cdn-static.com/uploads/4413707/normal_5ff6b9c33ad0e.pdf
    • https://cdn-cms.f-static.net/uploads/4480594/normal_6020724453165.pdf
    • https://cdn-cms.f-static.net/uploads/4420245/normal_5fda23e98374f.pdf
    • http://gixapedotamerow.mywebcommunity.org/automatic_transmission_problems_and_solutions.pdf
    • https://cdn-cms.f-static.net/uploads/4406213/normal_605a0aa00d2f9.pdf
    • https://cdn-cms.f-static.net/uploads/4426687/normal_60319aac276e9.pdf
    • http://scm03.ru/widobalpy03x.pdf
    • https://cdn-cms.f-static.net/uploads/4496381/normal_6047c0ecf1ed7.pdf
    • https://cdn-cms.f-static.net/uploads/4417675/normal_60157bd959418.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f3c4034a-4a94-4c47-b6c5-0445626d7bf8.filesusr.com/ugd/655f09_e0236134b8f14a498b125447666ea011.pdf?index=true
    • https://1f53f175-067f-4140-b001-f66bebc9855b.filesusr.com/ugd/c711d8_f97408adee154ae58cbb0baeb7065b30.pdf?index=true
    • https://s3.amazonaws.com/gavobawum/what_are_always_abnormal_findings_on_a_pelvic_exam.pdf
    • http://tifilow.onlinewebshop.net/70075240646.pdf
    • https://s3.amazonaws.com/megodipewukitoj/inventory_management_google_spreadsheet.pdf
    • http://duxegejuw.atwebpages.com/43897812759.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_off0002a597.bin
d3c0d2864b927bb882d5ce73810c48caf977d814c7f1502d135352baaf34fa5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x2A597 5772 bytes
font_01_sfnt_off0002b94a.bin
511fb144574e2a8335b49d6549b23f554fde61ae65c787d0143a348d5a8b765e
pdf-font-stream PDF embedded font (sfnt) at offset 0x2B94A 11748 bytes