Malicious PDF — malware analysis report

Static analysis result for SHA-256 23032ce7d2028401…

MALICIOUS

PDF

71.1 KB Created: 2020-11-28 03:44:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 302a9b8c57b45ac79a6cfcda16a1375b SHA-1: 7aabee210f8a78f45802de8ef3440fb62cf1d935 SHA-256: 23032ce7d2028401adda0065ef4e3f1cc8ab5812e16894d3db2c30907f6267c5
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffi.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=bekhayali+female+version+song+free
    • https://cdn-cms.f-static.net/uploads/4384817/normal_5f9fa5a97e601.pdf
    • https://cdn-cms.f-static.net/uploads/4386092/normal_5fa5366382ac3.pdf
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f9794c3e2101.pdf
    • https://cdn-cms.f-static.net/uploads/4373509/normal_5f893c15f0382.pdf
    • https://cdn-cms.f-static.net/uploads/4491665/normal_5fbe7d2db47f8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/eb3a2d22-1ad3-4b79-a603-ed2e688d8afa/68557245373.pdf
    • https://s3.amazonaws.com/nefagolom/vamodamesijarenagi.pdf
    • https://s3.amazonaws.com/fexuror/dizulidikobosofe.pdf
    • https://s3.amazonaws.com/mazugezijap/21757139614.pdf
    • https://uploads.strikinglycdn.com/files/af840542-1427-4458-b838-9c3a42bfedaa/free_ringtones_for_samsung_s7.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000e506.bin
2a2b29f88a87a666e454f9aec350ff1094c8173b1733f84feb31b596252c0baa		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE506 24644 bytes
font_00_sfnt_off0000afe8.bin
e336bc2976cffcf688f4de1702b38a7139f8e19fab2fb4a6e20be7aed91675be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE8 5456 bytes
font_01_sfnt_off0000c265.bin
75742a2b54123279088615a5795aff1e65648917872efe624270b9ad4c17d6a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC265 10028 bytes

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