Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3567368b39f24e4…

MALICIOUS

PDF

66.1 KB Created: 2020-11-20 17:57:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c8cf014f0c42c00dc93078fd2433692 SHA-1: bcbaf4e73ac5e1562370e8290a4b017363a57dd8 SHA-256: c3567368b39f24e45ceffbaf8a5bf724429e0de8e5d2a5080d210656ec941dd2
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by heuristics as a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site, likely for credential harvesting or further payload delivery.

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://trafffe.ru/123?utm_term=viruta+y+capulina+fotos
    • https://ziridizozavixik.weebly.com/uploads/1/3/4/4/134400570/zejog.pdf
    • https://cdn-cms.f-static.net/uploads/4503035/normal_5fb43e70c846f.pdf
    • https://kenixusosud.weebly.com/uploads/1/3/4/7/134772303/fe8fbfce975.pdf
    • https://xibemorebag.weebly.com/uploads/1/3/4/3/134355918/ronozof_nebimawematib.pdf
    • https://cdn-cms.f-static.net/uploads/4411503/normal_5f9b01ee876bf.pdf
    • https://cdn-cms.f-static.net/uploads/4457573/normal_5fabc853d6f36.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/petikamov/6389073184.pdf
    • https://uploads.strikinglycdn.com/files/4a5530bd-c1b9-4968-b64f-d498200c9136/gloria_steinem_wonder_woman.pdf
    • https://s3.amazonaws.com/bezegoluzose/panther_new_bengali_movie.pdf
    • https://uploads.strikinglycdn.com/files/58fd0d03-b93e-4de5-9928-16360e066bef/wiwofas.pdf
    • https://uploads.strikinglycdn.com/files/0dfc2c0c-3c96-4878-9874-b93b2369a7a4/mowutopid.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_off0000c4ef.bin
97af48919cc5a416a8952e8105de5007d47aa6b2f9e5a4be39209e6ef7526ce3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4EF 5076 bytes
font_01_sfnt_off0000d656.bin
c4c68ecb3e690df92bc8a18af85a25d056babe257fc0dfb3ebc2a8ad1d77332b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD656 11196 bytes

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