Malicious PDF — malware analysis report

Static analysis result for SHA-256 49df6ced1640b774…

MALICIOUS

PDF

65.6 KB Created: 2020-11-20 17:24:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d40395964de33dd5710dbaedcc453f09 SHA-1: 1e257277c0cbfc005e49c8619c484c2be01af076 SHA-256: 49df6ced1640b774a8f0d674576ee6cdb492ead925976719ab0d5117ccba24af
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 directs to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. No scripts were extracted, but the presence of the external URI is a primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/aws?utm_term=assets+and+liabilities+template+excel
    • https://cdn-cms.f-static.net/uploads/4415080/normal_5fb4f7714eb57.pdf
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f8987fc55bee.pdf
    • https://cdn-cms.f-static.net/uploads/4408601/normal_5fb761f8ca110.pdf
    • https://cdn-cms.f-static.net/uploads/4374520/normal_5f89757b5a9e0.pdf
    • https://cdn-cms.f-static.net/uploads/4459794/normal_5fa38d6481c37.pdf
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f9cf68739658.pdf
    • https://cdn-cms.f-static.net/uploads/4452206/normal_5fb3e79747cbe.pdf
    • https://cdn-cms.f-static.net/uploads/4449192/normal_5fb4482225550.pdf
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f872e6888115.pdf
    • https://cdn-cms.f-static.net/uploads/4375698/normal_5f8bed50254db.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bf86f8ca-1649-42c4-af14-20fe2a884d79/nom-_026-_stps-_2008_resumen.pdf
    • https://s3.amazonaws.com/vukumesoj/rockwool_50mm_fire_barrier_data_sheet.pdf
    • https://s3.amazonaws.com/dumupa/wenajolipaderitod.pdf
    • https://s3.amazonaws.com/baritexovopa/ez_smart_guide_system.pdf
    • https://s3.amazonaws.com/gewuwasi/cursive_capitals_fonts.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_off0000c725.bin
1989b7d2d544e64a643d8710abf261e931ec3d3a9f43fbb76acab5fc4831b585		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC725 5320 bytes
font_01_sfnt_off0000d92e.bin
9812c0d01142b4e6335f08773ede282d34088988e4092efdbb42a5f63b878c5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD92E 9548 bytes

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