Malicious PDF — malware analysis report

Static analysis result for SHA-256 904256acfb043247…

MALICIOUS

PDF

65.0 KB Created: 2020-11-25 03:45:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8a35c7f16b095d0a2773cb79b48b277c SHA-1: 78dc478fef189f04f9b092c98f0eec451dd3dd50 SHA-256: 904256acfb0432477ab55ca63f767715fa33ddbbe21c07765cd30d0112e3ff4b
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, disguised as a guide for 'Pokemon Black'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of a malicious URL within the document body suggests a phishing or redirection attempt, likely to deliver a secondary payload or lead the user to a fraudulent site.

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://gettraff.ru/strik?utm_term=how+to+use+exp+share+in+pokemon+black In PDF document text
    • https://cdn-cms.f-static.net/uploads/4468828/normal_5fbda0ad982cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369768/normal_5f8908cb26f4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_5f8f63bdf289f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465690/normal_5fa5a1cea256c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382187/normal_5f9aea5251ed6.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/093f0857-bd1c-4cea-a66e-58c07b07f44d/97045307751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb5e9750-8981-469c-b259-c3c93dbb0e0a/jegoxerogugexo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1210e4f0-7b8a-4728-93d6-07aaa60bc5c4/20397905149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b54a7798-6603-4b25-ba2d-5d4b6dd173d1/74160412663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87e94b82-6e49-46d7-8539-72c8f36d2959/rift_primalist_healing_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57d61c21-dca0-44f5-8114-d59e69c1382c/lopobenusoxunumuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20c04aba-59e0-4c8c-a209-271b18ea82d8/pobiboxumejupile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/713fc1da-039c-4415-bc51-ca6070ea4e0d/la_puente_building_and_safety.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddd72f53-f610-4f3a-8a4c-43d6e5a34825/75093805127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc113587-e287-4956-9fe9-0b60264b4815/zitumikezuparaxowupewuno.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_off0000bfc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC7 5500 bytes
SHA-256: c57923bcc0de073a739a50950a0637d573149b91c061679a6720de1dfb0a22e9
font_01_sfnt_off0000d25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25B 10724 bytes
SHA-256: 478a2589015fabff2e65deb7a5196d31274d35108a02989ff253b69725235cc0

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