Malicious PDF — malware analysis report

Static analysis result for SHA-256 266a879d921726bc…

MALICIOUS

PDF

66.4 KB Created: 2020-11-25 13:24:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: cd76d2cac2f20ca9b4f9459892061a51 SHA-1: 4632bfaa45303e21b0233b9d2695da1e71dbd7df SHA-256: 266a879d921726bcf2d0e9642272b67a860f70fb14b8502688b213c2e89cd26b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://ggtraff.ru/123?utm_term=the+final+empire+pdf+download'. The document body, though heavily obfuscated, contains text suggesting a lure for a PDF download. The ML classifier and ClamAV detection further support its malicious nature, likely as a phishing or trojan delivery mechanism.

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/123?utm_term=the+final+empire+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4486742/normal_5fbe23483ad77.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/netinuwa/checklist_templates_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d46540dc-91d3-48d2-9bc3-96db69944c4a/53608535154.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/wapob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e94f076-2c4c-4329-9314-e573718810a7/hisd_psc_connect.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/54300923283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e40da71-6f94-4d78-8d67-4cb7730111ae/jofubenekivukag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c364c64-1ed5-444c-8f65-72a8222542e4/62476064292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fce233fc-243e-4670-9ad6-c202fd075445/reviso_lleva_acento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bb3e1c9-9305-43b6-a90e-8cc54f2a6ca8/tennessee_hazmat_test_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bab862c-83cb-4a1b-accf-ebf2ba37b527/23932332109.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8CA 4852 bytes
SHA-256: f4f7a7567b542bbf000fc4794a745eec6cb5872de94443f78d403a1d462e0714
font_01_sfnt_off0000c913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC913 11008 bytes
SHA-256: 26fa697223ca57981e5db8d3ab4b4636af308cb9af5dd8cd464257074786824f
font_02_sfnt_off0000ee9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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