Malicious PDF — malware analysis report

Static analysis result for SHA-256 86fc992ecef8c062…

MALICIOUS

PDF

64.4 KB Created: 2020-11-09 18:56:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 008c2c77ae3663fc56451f86b3e86336 SHA-1: df841b73bd8f4f18b45f42959505cd3b756814b1 SHA-256: 86fc992ecef8c0626f7b729ffd967f391037f2f7d0f5ef26300e75c9a2b4bbb1
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 0.9997

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/aws?keyword=sunrise+ridge+intermediate+school+utah In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370077/normal_5f884c950e066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408702/normal_5f9a8edeaac27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369905/normal_5f881ba5613a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_5f8b2c9be11b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392453/normal_5f96911727c3c.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/233dc146-b7f1-4f2a-906b-40b033fa78cb/coma_robin_cook.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/tsum_tsum_app_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91845c8a-6976-4ded-954f-c34dd753b992/y_no_se_lo_trago_la_tierra.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/26096537074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f59ccc0-7724-4483-a870-4c193084771b/81663904146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1797c17-f616-4d1a-9bdd-02a04109b006/22196177355.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5ab1234-be98-4b02-a61d-36db4d5f337c/35041392443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a02cbf5e-e6b6-4fab-929e-6962b414503c/lobalijabanejasawas.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b36d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB36D 5456 bytes
SHA-256: 470059b971ccae700bced829556b042db58493206659562d02ac42e0791bca78
font_01_sfnt_off0000c5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C3 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off0000d127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD127 10216 bytes
SHA-256: 9ed9037c4a47b9072396ee995f04b8177cbf3411ff8bb2fb1e33c2810903bf8b

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