Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c3af745f4656306…

MALICIOUS

PDF

67.9 KB Created: 2020-11-21 23:51:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fec8048c6def67c3d1b8dd66997d12cb SHA-1: 28786ae537ca5f8d5da22ef1df8d07df8b6abc7e SHA-256: 4c3af745f465630621f8fbbc887d3bb4abe39d35d6cfce359b3f5f4c969f8c6e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/123?utm_term=the+simpsons+tapped+out+apk+mod PDF link annotation
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/digokasawuj-jipamuputevuf.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/1a2a240ef.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/lazogefowibupudadume.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448096/normal_5fb91c1d5dedd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393190/normal_5fada45661f9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387709/normal_5fb6ba8baec88.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/apa_style_manual_6th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82991e72-f200-429b-b21f-61c02019a865/14110832170.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/avery_5354_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/82226340747.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_off0000cd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD84 5084 bytes
SHA-256: 675d3a1945c628f10a48dca487413f684e581821766759c7aee16ca4b0fe4e63
font_01_sfnt_off0000dea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA3 10460 bytes
SHA-256: 531e59cc0fd4827f59def7a822dc897ff9939c9b0d9507d8d9eeb08255fefe8f

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