Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e8a1e4ad458763…

MALICIOUS

PDF

71.2 KB Created: 2021-01-12 12:18:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6e2ec216940e303f644db32038769314 SHA-1: c07abaee959efc94429c954ebf243ee78b8c14d2 SHA-256: e3e8a1e4ad458763d715f2867916c2416b42260baaf8ec757fc2b697e7ca56e9
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely the intended destination for the user. The document body, though heavily obfuscated, suggests a lure related to 'secondary roads'. No scripts were extracted, but the PDF structure and embedded URI heuristic indicate malicious intent.

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
  • 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=por+carreteras+secundarias+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489429/normal_5ff073071a63f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487906/normal_5ffb865abe4a9.pdfIn PDF document text
    • https://site-1177329.mozfiles.com/files/1177329/99256647927.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489415/normal_5fdc520c9571b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470828/normal_5fe73d14a745c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412403/normal_5ffa4e372f9a8.pdfIn PDF document text
    • https://site-1174356.mozfiles.com/files/1174356/jamafunotamonuriko.pdfIn PDF document text
    • https://mowuvesetotodoj.weebly.com/uploads/1/3/0/9/130969800/5249823.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/buwosevax/volume_of_shapes_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/98027027460.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/auralex_great_gramma_isolation_platform_v2.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_off0000d861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD861 5116 bytes
SHA-256: 3f533e510853ed6cef2a0802bff94cdbaf5e44a694ea89d4aa7d375aaf39cad3
font_01_sfnt_off0000e9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D6 11264 bytes
SHA-256: 1cd4b6fe47475a8554745011a4c133aaa9ffa867768498b8f4fdfafdc046ffdc