Malicious PDF — malware analysis report

Static analysis result for SHA-256 d18f39ef379d57e6…

MALICIOUS

PDF

92.2 KB Created: 2020-11-20 07:28:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c7c24ab568b667991ea84bc32d939123 SHA-1: 21dbd8b3a19940bad8452f61bfdc0f5919138911 SHA-256: d18f39ef379d57e6f6e87a6d8a3f70d69b55d190ce771cf2d8dffc4b06f2af56
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, indicating an attempt to phish or deliver malware. The embedded URL `https://ggtraff.ru/wb?keyword=netacad%20answers%20it%20essentials` is flagged as malicious. The ML classifier and ClamAV detection further support the malicious nature of this file, suggesting it's a phishing or trojan delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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/wb?keyword=netacad%20answers%20it%20essentials In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f87f6639e5f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376602/normal_5f8e5b1b306b6.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/tetazino/7659898751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/811879e7-83dd-4805-bf2b-e181df2c6159/sturdy_enchanter_coat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2d57445-f0f2-421c-bdad-d5b3ad8b1538/julasavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0803fe5f-6d4e-44a7-bf7a-aa989e83d96a/zomasiwijugew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b35fa3b-56e4-49fa-b8ed-1ac3019ac8a4/71756507529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/457255a9-4535-4bec-82e4-577416641729/hampton_bay_ceiling_fan_remote_control_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab6bf31-051d-407d-bac6-73b24d073359/nogowupujapebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0730d5c9-0fde-4f89-882f-fa886efdab5b/claim_evidence_reasoning_activity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a985cd8-640e-4013-809d-cff9f912a10e/tixazetexogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aafc6a17-50cb-4ccf-b377-0d77aebb09bd/82470731765.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_off00012f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F69 4992 bytes
SHA-256: 65813d2e47fe41e1063c6e93f63c69827c3d299c2d616af88053733e6dad0f26
font_01_sfnt_off00014085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14085 10504 bytes
SHA-256: b58d55300fdf79f7811598a8769fbed3d3cded7cfff3bd09e2e91221c244b573

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