Malicious PDF — malware analysis report

Static analysis result for SHA-256 a48067330fe138f8…

MALICIOUS

PDF

65.4 KB Created: 2021-01-22 22:54:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8b93b750c2dedadedf0094eec0df0ed2 SHA-1: e1034f70de7bdac352570c04077244dd4b5e74c3 SHA-256: a48067330fe138f8eb8581a5f7de0d7f5016c1f670147c35667e3dcceb55f8f0
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file, disguised as a coloring sheet, contains an embedded URI that redirects to a suspicious domain. This suggests a phishing attempt to lure users to a malicious website. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://crophysi.ru/aws?utm_term=caterpillar+to+butterfly+coloring+sheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4499935/normal_5ff24c1fdd130.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473656/normal_5ff1f484c163d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383577/normal_5fe5324ac9b0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476946/normal_5fef7100b9f14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450517/normal_5fcd33fd5411f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417992/normal_5fcb20150ab2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412170/normal_600b2ec5b6b7f.pdfIn PDF document text
    • https://site-1259189.mozfiles.com/files/1259189/billboard_music_awards_2018_performances_watch.pdfIn PDF document text
    • http://somukegizos.66ghz.com/nezeratowejanofuxif.pdfIn PDF document text
    • https://site-1178235.mozfiles.com/files/1178235/53602729477.pdfIn PDF document text
    • https://site-1230430.mozfiles.com/files/1230430/mokokemilix.pdfIn PDF document text
    • https://site-1174826.mozfiles.com/files/1174826/nature_sounds_free_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385235/normal_5fcae727571ac.pdfIn PDF document text
    • https://site-1171107.mozfiles.com/files/1171107/gefabojub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://waxuxeg.rf.gd/lugiga.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_off0000c2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F7 5424 bytes
SHA-256: 176c7d1196d86e38d321dc3afb27c06dc9b5ca59403994f7e721a82ae11b278c
font_01_sfnt_off0000d565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD565 10312 bytes
SHA-256: 9bb945050cb2914ccf8903ffd2e9c296083eb152922267a96c9f5f338e8ab5b6

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