Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df668a7e3437534…

MALICIOUS

PDF

68.4 KB Created: 2020-11-25 08:17:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bac4e10afc53b23953c6de0f2f6a1519 SHA-1: ee2ae9b86546dbc7f5b9417fe07ba41e060b1f6d SHA-256: 3df668a7e34375343d12b9b76b905042701c6153b9a2a921c8c13c7931f395f1
162 Risk Score

Malware Insights

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

The PDF contains embedded URLs pointing to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body suggests a lure related to 'honesty worksheets' or invoices, aligning with the SE_INVOICE_LURE heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack vector appears to be directing the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9892

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://cctraff.ru/123?utm_term=honesty+worksheets+pdf In PDF document text
    • https://tilafiranude.weebly.com/uploads/1/3/4/3/134314128/tomuziwonixu-pavofigo-rexowaboxedab-ketebazagelobu.pdfIn PDF document text
    • https://kebezade.weebly.com/uploads/1/3/4/4/134479439/840398.pdfIn PDF document text
    • https://savakorudefipe.weebly.com/uploads/1/3/2/3/132303238/1092709.pdfIn PDF document text
    • https://zexirajeroluwub.weebly.com/uploads/1/3/4/8/134848753/8e94693179e40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_5fa57dcdbc577.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b372dd5a-d23e-48c8-adfc-ada77771cbff/fast_and_furious_7_free_download_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b81fd5d4-e07a-4953-88c8-6a3f54403533/lion_beaver_otter_golden_retriever.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/lemuxepimebojubemedejilup.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC25A 4848 bytes
SHA-256: a8675682991dcce92c912ef840d10592201c21cacb147e8085e46ec85a3faeb5
font_01_sfnt_off0000d2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DC 10648 bytes
SHA-256: f3f68ae5cf2a4f4845e15c0f040907f0fea925ab08554e929b7055368b52f9cd
font_02_sfnt_off0000f747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF747 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.