Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da2b775414b87e0…

MALICIOUS

PDF

71.8 KB Created: 2021-01-16 13:44:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0c80b82ee32169ae255aa9572f075685 SHA-1: b9bac7891dd77e49ade37bb8e463ff74a13e1a3c SHA-256: 9da2b775414b87e01f1fb824ab81da5e940b59c2b430fa982d04ef5a2cb57eeb
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. The document body, though heavily obfuscated, contains text related to 'gauge chart excel free', suggesting a lure. The ML classifier and ClamAV detection further support the malicious nature of this PDF, likely used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://traffmen.ru/aws?utm_term=gauge+chart+excel+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4422148/normal_5fc0a2dcdd419.pdfIn PDF document text
    • https://site-1178347.mozfiles.com/files/1178347/lean_on_me_10cm_piano_sheet_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415518/normal_5f9487edcbd3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379219/normal_5fed3abc3e148.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_5f8b5d9a328d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481164/normal_5fc500b8c6089.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424647/normal_5fe9d02fcf94d.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/bolovopizonuki/orcad_17._2_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/google_drive_photos.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/vpn_proxy_master_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/46644295534.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/bhavesh_joshi_full_movie_free_filmywap.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/ati_radeon_hd_4550_driver_free.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_off0000dd44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD44 5064 bytes
SHA-256: 9e4af8636ca475476bbee166fe6033ecc5f334737720d4e928e022b289dc5ba0
font_01_sfnt_off0000ee88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE88 10532 bytes
SHA-256: 335819ca5ed7aa6bd0cb47abf72581c8372dea66696bed49823ab7e69d035d7b

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