Malicious PDF — malware analysis report

Static analysis result for SHA-256 111e08eedec19119…

MALICIOUS

PDF

76.2 KB Created: 2020-11-18 12:02:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c96df7543bf27c76a80bf012565b0f31 SHA-1: 89c6a36b6ae2a3c8cd76ee78b8a199bf63c16663 SHA-256: 111e08eedec19119002199ba5838febabdc1eb98eaf711ed17e3bbd3261937a1
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

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://gettraff.ru/aws?utm_term=read+kindle+format+on+android In PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/gevuloxaxaretikuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f9984fea7bdb.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/de2f578f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417312/normal_5fa9e6ca11485.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/8c0051a3-d9db-410a-a7cc-e7e69326b150/fanojepefomugedewuzopipus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/458beaa2-102f-4c0d-9a85-f01503580a3d/baguvimavorunivobuvoregab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/143e6834-2946-43b3-be80-40c43d6fa436/42451760447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6895b1a6-d4eb-4a10-ae64-683c8acc3a63/tutenizokubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1c1604c-ec86-4330-a6d1-db2347f4b91b/consejo_tecnico_escolar_2018_secundaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3d4062c-a815-40fa-b7b0-45d9772b0150/kumerujuvar.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/volvo_owners_manual_xc40.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0f0d83d-d47b-4b06-99d8-e8db17052ea6/45805851316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3277e929-18f7-4b65-8703-a3abc2fb831f/battle_of_mirkwood_battle_royale_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bc474ea-fcf4-478c-84b2-bce105f6abdc/62743185.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/kirivupipo.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_off0000d908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD908 4944 bytes
SHA-256: cd0dccf9111c37122bbcce3f1b696a70e28ca55990d2aefb2e6868c1aff47eff
font_01_sfnt_off0000e9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CE 10536 bytes
SHA-256: fb6e5b0654f2927c09adf695ce1844e513f2a6381d401f323279ff1d17fb2ede
font_02_sfnt_off00010e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E33 16108 bytes
SHA-256: f2cdb932ee13b796740eb614e233a545327b697588f9e663f06ef4c88113e31b

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