Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb341bbafd35b9e5…

MALICIOUS

PDF

68.1 KB Created: 2020-12-19 12:42:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6839e8715e31ddaaa38c794d0870d79a SHA-1: cbdb2062a869b973b8e92be6bdddb8cf53a746b1 SHA-256: cb341bbafd35b9e5e8e11b92db4fc3d16c45269f85a313771a711b82f76ae6fe
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 as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely used for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site.

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://traffnew.ru/strik?utm_term=royal+oaks+elementary+visalia+ca PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368237/normal_5f892808d3c3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369328/normal_5f8c7ca0eca78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377400/normal_5fbd71ff5b6c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421366/normal_5fa9befebb945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_5f8e2d35e083b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446158/normal_5fb2f1d401a06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450156/normal_5fcd8bd5b6552.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459321/normal_5fba10168c222.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc10f7f085bf90c0efdfe77/t/5fc61e4f3c6ccf69f3302751/1606819407923/98714172458.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/diagramas_de_operaciones.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d3e7a87939686429f1a7/t/5fc73fc42ac13f1ee9b7a26e/1606893513577/mokobepereku.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/43235853866.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfe7e212facd59cea75dab/t/5fc37edceaf37e3b64090c18/1606647516334/wutamufenubatuworojat.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28ce3085bf90c0e07a8cb/t/5fc4cd515147b14804c99ffd/1606733138476/sixigamojoluguguna.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_off0000cca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA5 5176 bytes
SHA-256: 80c5c7a21ac7fc1e1bcb0e95934d2890491bf7d1c85a34737d5f6fef607d3425
font_01_sfnt_off0000de3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3D 11016 bytes
SHA-256: 9e335b7bdb8a2b40988e1c8ba5872777994e645cfda8e0299931d9d5b8acf63d

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