Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2a98f967aba5c9…

MALICIOUS

PDF

79.8 KB Created: 2021-01-06 06:45:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 57133424ba789534f3a4b8827a313a2d SHA-1: 7d7d874204ea1a1dbfb3de960e1b3b05e2ec65e9 SHA-256: fd2a98f967aba5c9a5554f2c489eea25a92f0596b8bc71f1d49607bc46c8fd96
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://traffking.ru/123?utm_term=class+in+c%252B%252B+object+oriented+programming' is identified as a malicious redirector. The ML classifier and ClamAV also flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://traffking.ru/123?utm_term=class+in+c%252B%252B+object+oriented+programming In PDF document text
    • https://static.s123-cdn-static.com/uploads/4426410/normal_5ff2396bcaa2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460072/normal_5fea45aa64756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415080/normal_5f9d153425944.pdfIn PDF document text
    • https://pefodiral.weebly.com/uploads/1/3/4/4/134476409/2205076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475392/normal_5fb3f20554503.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/fiigjhi/guzopesovanigij.pdfIn PDF document text
    • https://cdn.sqhk.co/zutujodara/LhaFiaz/doot_meme_gif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405440/normal_5fe0bfba23232.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6dc48bd-a731-4e63-8ac9-e4767121aa3d/nanemodizejubi.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_off0000fd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4D 5516 bytes
SHA-256: b48c51aeac12df6d74259398fb12f199df5eeec7063c20e3a6d11f346eb2c6c3
font_01_sfnt_off00010fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FED 10260 bytes
SHA-256: 6c33b0abbb35f7ef0ea2cba56af0e85234a4ffc048ddfeca02df5f799230d876