Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e8115ebb728da5…

MALICIOUS

PDF

65.7 KB Created: 2020-11-11 02:14:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 05cd16f6a3917043abf782931df73c91 SHA-1: 10d3bc0f63a97f28af4389eebef1a518c941184a SHA-256: 11e8115ebb728da5364c23acd4d0b850ccf2ede59fb72313d94b432bf2aca96c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffmen.ru/123?keyword=paradise+lost+plain+english+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374689/normal_5f896000603ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412568/normal_5f9501abad57d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419204/normal_5f97ed9cc9b7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416131/normal_5fa27b5ad2e74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377112/normal_5fa2b65b43544.pdfIn PDF document text
    • https://taxepenobeg.weebly.com/uploads/1/3/4/3/134355702/5962143.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/339a40e1-931e-473e-8490-11007e41d02f/54366517689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5514725f-c835-4d85-a859-b7d2c4d3775c/super_skamper_ramp_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/415c2df4-4f8e-464f-ba5a-b62f902cccbc/arachne_soul_eater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19c5045c-dd8a-4440-98fa-1e25c5c9fa80/rajagewoviboma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6ca0e66-c2e5-44b5-9736-a15afdf70c4e/revature_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be980ca2-b3e4-4a55-9deb-a96d83851fc6/81869180755.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_off0000c4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C2 5304 bytes
SHA-256: 481d9a5eec74713759e22edf11445622711f40125b4f825c6ac4e732bbce1373
font_01_sfnt_off0000d6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CB 10912 bytes
SHA-256: 80920c7846c1a180be9ff1aee71ccdcd1b7bc5a5075bf431bc65326711c69918

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