Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ebfd87c0e0c9767…

MALICIOUS

PDF

61.4 KB Created: 2020-11-22 03:31:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ffd8194267c8f36fe2ba8723cae1109a SHA-1: 53f5159ac83d47ccc68c53e5cfa8d17d58a03043 SHA-256: 9ebfd87c0e0c9767a00f05f7e3c59bf4464e88b95b70b8b3cd66dee0cd03c6c7
214 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to redirector infrastructure, including the URL 'https://ggtraff.ru/aws?utm_term=template+birthday+invitation+free'. This suggests a phishing or scam attempt disguised as a free template. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the execution of embedded JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ggtraff.ru/aws?utm_term=template+birthday+invitation+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382958/normal_5f90b29f8a9f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_5f9edfde9a7ba.pdfIn PDF document text
    • https://rigafefabapamum.weebly.com/uploads/1/3/4/4/134486683/kowimi_rubiguvezosu_pagukosebonano_rorebijugexen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387929/normal_5faa2acb179c1.pdfIn PDF document text
    • https://romesezex.weebly.com/uploads/1/3/4/6/134605020/jisoxodexomumu_wimusekal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f8c51c79145e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382414/normal_5fb34c1012437.pdfIn PDF document text
    • https://nukawidizuzaxep.weebly.com/uploads/1/3/3/9/133997642/11930.pdfIn PDF document text
    • https://xawajedub.weebly.com/uploads/1/3/4/8/134886715/gedonofojuv_lemupawutele_wexakexape_jawototaxiboze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372696/normal_5f9628f2568c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412584/normal_5fab6dc363c0c.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/tajimipojimo/vectors_mathematics_crash_course.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/understanding_business_ethics.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/creative_resume_psd_files_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_off0000b38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB38D 5352 bytes
SHA-256: 8219d14a909473224f19bfc7e829164a3f46dda5482a6b5ef0c5a83f1d1ec92b
font_01_sfnt_off0000c59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC59E 10540 bytes
SHA-256: 427443a03f788cca90a151e84c04bab5e7256a1f72a39caec337ba4f9e35880f

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