Malicious PDF — malware analysis report

Static analysis result for SHA-256 634c52089a9534b7…

MALICIOUS

PDF

74.5 KB Created: 2020-11-19 20:54:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a2c21fe2b4d1398776489d5f973b4620 SHA-1: a913f5db485e9c8f73e55647dbde5a51ab5ff7ae SHA-256: 634c52089a9534b718e824b1b98a744efb17f0809d0e7ccaeda46e78dabd890c
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://traffine.ru/123?utm_term=the+master+cleanse+pdf+by+stanley+burroughs'. This URL is likely used to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious, and ClamAV detected it as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/123?utm_term=the+master+cleanse+pdf+by+stanley+burroughs In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f88b3935302b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387037/normal_5fa1dc5d117a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413697/normal_5f997856339ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f87607392aa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_5fb378273f598.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450151/normal_5fa4b7cf72332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f937b605f333.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379969/normal_5faafd15a7235.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/nowokil/81033029007.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/juxag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dc6678e-d823-4b7a-8e60-53d04cdf4c9a/46097648084.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/google_adana_mewalam.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/sebirugezejup.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_off0000e2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C5 5760 bytes
SHA-256: 324b197b0f2baacfded7efce4102415aa0918749e9ed2881c5022e55b46f5c48
font_01_sfnt_off0000f632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF632 11748 bytes
SHA-256: 691ccb035e7910c3215c0dbb636b899024101fdc52aa3da4cadfd30108e3fa6f

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