Malicious PDF — malware analysis report

Static analysis result for SHA-256 c704b43fe67549d3…

MALICIOUS

PDF

71.0 KB Created: 2021-01-13 07:42:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 015c05a3176d68be4ae756eaf09da38d SHA-1: 6a3ad26a05222747d99377af905b9cf683543506 SHA-256: c704b43fe67549d3c3a4dd8398ae0a5abf75412bc6f1249126a0988fc3823fc2
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=7.3+cell+transport+ppt'. The ML classifier also flagged this PDF with a high score, and ClamAV detected it as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a compromised site, characteristic of phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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
  • 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://gettraff.ru/123?utm_term=7.3+cell+transport+ppt In PDF document text
    • https://static.s123-cdn-static.com/uploads/4376609/normal_5fe41e56a7dc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383568/normal_5fa861dd6095a.pdfIn PDF document text
    • https://manomukujoputu.weebly.com/uploads/1/3/4/5/134517900/bemalixalunasuxoj.pdfIn PDF document text
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/2794990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5fa31a5c9e546.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452381/normal_5fd76095a3f9b.pdfIn PDF document text
    • https://vomimefime.weebly.com/uploads/1/3/5/3/135316042/5544492.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/vapelurowar/sovazorujerebonot.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/bajrangbali_animated_wallpaper_hd.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_off0000db6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6A 5108 bytes
SHA-256: e9fc35edeebeabee13e72c8ef0b9ff7966dfd6a5e29c7dc08afc44aedba4e4a4
font_01_sfnt_off0000ece2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE2 10192 bytes
SHA-256: 62e5fecaafbca808d338f000ab008050c15435df9c5e4bb2066912a3f72477d5