Malicious PDF — malware analysis report

Static analysis result for SHA-256 3da5159013982253…

MALICIOUS

PDF

61.7 KB Created: 2021-01-14 06:48:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 16808d9bd01c076daaeecd95971a1476 SHA-1: b32c9b86efc9a440bfc79daf6ef6582cdaba56e1 SHA-256: 3da51590139822532019dcb80aea247e2a8585a80a9a69812ef2731334af0240
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URL that masquerades as a movie streaming link, likely to trick users into downloading further malicious content. ClamAV detection and ML classification strongly indicate malicious intent. The presence of multiple suspicious URLs further supports the phishing and malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=fugitive+at+17+full+movie PDF link annotation
    • https://cdn.sqhk.co/zerurukoraju/CPjhelU/393190751.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481990/normal_5fc83dc673e78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419430/normal_5fc335757acb5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374848/normal_5feb40c78af86.pdfIn PDF document text
    • https://vonepegoparopew.weebly.com/uploads/1/3/4/3/134352316/tijonawowopaf_digozoremitib_waxigiza.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/3263245.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/pegek/zajilalosunelepegu.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/best_kenyan_catholic_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/ericsson_mobility_report_2018.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_off0000b8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8B4 4960 bytes
SHA-256: 04806b8c95c8a1c872ab4367b409fb7363ffd61784782b40e56f1fb2348d769f
font_01_sfnt_off0000c9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9AD 9692 bytes
SHA-256: 7d1b2e356b6f3f0fbbd03c179be9e70cafc61d75cd6a3a643ef83dca3fd3de7f

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