Malicious PDF — malware analysis report

Static analysis result for SHA-256 10d5975c04e62f7a…

MALICIOUS

PDF

59.0 KB Created: 2020-11-20 19:19:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 907a443953009ab1d5ea9229dde1054f SHA-1: 1484bd1fbca319a0c0b587c8bdeb49d1f8816903 SHA-256: 10d5975c04e62f7a61e51024abad07e3871a96be3b12b00b200bb313e50279a1
214 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 embeds a large number of external links characteristic of an SEO link farm and 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 0.9996

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=washington+department+of+ecology+jobs In PDF document text
    • https://widosutolitidaf.weebly.com/uploads/1/3/4/8/134847614/797c4.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/rovikibixu/case_study_research_proposal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4472818b-072d-4e16-b0f6-2236a29da212/81268868263.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/chughtai_lahore_lab_view_reports.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d17ee3-029d-4b82-9c48-b2909cfe4779/77804353905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/215950ff-741b-4164-8bf8-56945122e138/bawupokotoko.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/letisaxigiwevatokened.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/71038556785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30212f5a-95e9-423e-acd3-712bc48941d9/17132973301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cf08d5e-cde0-4253-bb06-f79c9212794c/strength_of_materials_solution_manual_scribd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c271306-890b-4b8e-b2ad-b9b71cb58a6d/kusiwimunowoxisu.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB12 5900 bytes
SHA-256: dd43c913bb145f6b590d5b805a9b72444eb0404d7a5d3b84bd7048cd0ced4e92
font_01_sfnt_off0000bf15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF15 9624 bytes
SHA-256: 5a9d309c46044b7db5360ef849baa6253f1ed3c8093d2845ff687d04a2c59e03

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