Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4011813ba46a6bd…

MALICIOUS

PDF

60.0 KB Created: 2021-01-24 01:26:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1b25e3b7293557981dde218c78843728 SHA-1: e9d34a5a3e6c4f510ae215febccb26940774759e SHA-256: d4011813ba46a6bdf77a11fbb14d9aa2a63271c1cf0d61141f7f738d51646c43
154 Risk Score

Malware Insights

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

The file was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically the URL 'https://traffmen.ru/123?utm_term=pampered+chef+manual+food+chopper'. This URL is presented within the document body, disguised as a product manual, indicating a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness, supporting the overall assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffmen.ru/123?utm_term=pampered+chef+manual+food+chopper In PDF document text
    • https://cdn.sqhk.co/tumupowe/heqhahj/lazoketovudejusafimokatu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443342/normal_5fd84523666fb.pdfIn PDF document text
    • https://site-1179563.mozfiles.com/files/1179563/jukedopenivo.pdfIn PDF document text
    • https://cdn.sqhk.co/lapitobexeva/7ohdi4T/785744556.pdfIn PDF document text
    • https://site-1175796.mozfiles.com/files/1175796/35371572615.pdfIn PDF document text
    • https://site-1176699.mozfiles.com/files/1176699/83569463340.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/qriaWjg/18278789717.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383921/normal_5ffde9c93b704.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445754/normal_5fdb0605c06d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374519/normal_5fee821e3dbb0.pdfIn PDF document text
    • https://site-1168003.mozfiles.com/files/1168003/fiwuzupi.pdfIn PDF document text
    • https://cdn.sqhk.co/makevefix/eijbgh3/vologofotovuvebazefifaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000b164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB164 5216 bytes
SHA-256: 38ee40288894ae6bdf44c22979dde0730348e7aa24e2b6295384dda5e60d5c40
font_01_sfnt_off0000c2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2FA 9544 bytes
SHA-256: 090fbdf111a7f5387d1d5e56c4170ee893ef2799d45feca9a1710404379c6b98