Malicious PDF — malware analysis report

Static analysis result for SHA-256 5146e1cd0c4e720b…

MALICIOUS

PDF

76.2 KB Created: 2020-11-24 11:02:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 9124d4e6129c380276edda715daad46d SHA-1: debc8166c9ea885daddb56b64263cef0e0453119 SHA-256: 5146e1cd0c4e720b3d6f04f26668899b6c43b451b7aaf537367cdcf382fb8520
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 0.9998

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://traffmen.ru/strik?utm_term=reglage+horloge+tableau+electrique In PDF document text
    • https://cdn-cms.f-static.net/uploads/4459921/normal_5fb8b7db28996.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390659/normal_5f9475948971a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f89179890e46.pdfIn PDF document text
    • https://fevixivosetakub.weebly.com/uploads/1/3/2/6/132681861/b706df315f65.pdfIn PDF document text
    • https://rujovisaz.weebly.com/uploads/1/3/4/3/134328318/pifodobirarevon.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/f4889300-3cea-4920-87ab-4194706fd497/93323425645.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/kumon_math_answer_book_level_d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0830db49-e38a-43f7-b350-569259b01828/chapter_35_electric_circuits_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/five_nights_at_freddy_s_camera_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1418033-bc33-4929-be80-17e4e06db50d/gobolo.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/jedopikosojatitozavame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eb48a1b-a79c-4b60-b217-ce5cbf7765bd/16443963513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6c4db52-d0e6-4461-99e5-95e55bf6c540/54439342348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf94c9d0-ca5b-4f6c-bf61-89f36db581ef/pes_2019_controls_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/fukete.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD933 5156 bytes
SHA-256: 920684f371827e51dd1a3fc7ed514172fe558e90fedb5eda9f8a7c815b94b1c2
font_01_sfnt_off0000eabf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABF 10656 bytes
SHA-256: a53d6950d1f720e4ac22c01e99e1ffb5d28dc604c0c208496b3ee6692212c338
font_02_sfnt_off00010ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF8 16060 bytes
SHA-256: dea42a645509e47913d94a3c1ff2e7ffecf6ca7e8d06e08a5f86f932263db97d

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