Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4118909112dddb…

MALICIOUS

PDF

75.7 KB Created: 2021-03-14 00:58:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7fa954a0976ecae959ed900c7e62f34d SHA-1: 272c298870c2f954559b6b3e8e4b47017b28c5d7 SHA-256: fd4118909112dddbc44bd862261b52db41b9b01e8547744946d14338c3830d4b
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The document contains numerous external links, including one to 'seumenha.ru', suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and the presence of external links indicate a likely attempt to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=introduction+to+islamic+banking+and+finance+brian+kettell+pdf PDF link annotation
    • http://steelsho1.club/wexarurizc4yba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369631/normal_5fec32457380b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486045/normal_5fcc2958aba21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489402/normal_60381c56131bb.pdfIn PDF document text
    • http://wilozobugo.iblogger.org/year_calendar_2018_excel_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460043/normal_6039d5a54c47a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487622/normal_600ce07bb5faf.pdfIn PDF document text
    • http://adanakebap.org/zarobufala97mz9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_603449e52c7e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461484/normal_5fff01e6d984f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393193/normal_5ffd72ea76190.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475988/normal_600083f1b2905.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368481/normal_6006d1a0e0759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389387/normal_6015c451d827b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_2c70bb80632e4e7b9ced2bfc10ef4817.pdf?index=trueIn PDF document text
    • https://19d8af67-ac20-4a7c-8ffd-69be953788a8.filesusr.com/ugd/578741_5eae8cf612cf487eaa29afd38f0c9540.pdf?index=trueIn PDF document text
    • http://pagolojesuwagi.epizy.com/50341792739.pdfIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_1d576b5a83464910af17b03d62977af5.pdf?index=trueIn PDF document text
    • http://wubalele.rf.gd/51940224779.pdfIn PDF document text
    • https://09972071-4174-499b-90b1-de3619f59f53.filesusr.com/ugd/d1c05f_66a7fc2c7ed0466286c25001f667a4b3.pdf?index=trueIn 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_off0000ea38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA38 5616 bytes
SHA-256: 344483a728695bab8e75401447710b1d39fe93fbb69051e0f559661c0c299085
font_01_sfnt_off0000fd40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD40 10428 bytes
SHA-256: 17223d0fe5b9e29f0deeee223a9c7f2cc46d7c783316d76706245d5fbca22a32

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