Malicious PDF — malware analysis report

Static analysis result for SHA-256 451d2c6cab5f6e31…

MALICIOUS

PDF

71.0 KB Created: 2020-11-11 15:02:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 513c67d4d95b39709f3a3154075bbc6f SHA-1: 1821871f9cad28b85c7dc649c1edab24128bbb0f SHA-256: 451d2c6cab5f6e3113f39aa960fffb984371edb9fbff9322d7eb8095dff5978c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which points to 'https://traffking.ru/123?utm_term=minecraft+apk+1.14.20.1'. This URL is used in a lure to download a Minecraft APK, indicating a phishing or scam attempt. The ML classifier and ClamAV detection further support the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/123?utm_term=minecraft+apk+1.14.20.1 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367644/normal_5f99ef761f356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403406/normal_5f9f31dade468.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389821/normal_5f932204e8786.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/557473d2-180c-445b-add4-6f6a11e79801/pezidunefudagigir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/471ffb64-7afb-4cf9-b466-2da94b01c7b4/humorous_table_topics_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc3079bb-6053-4dce-a283-8ffed4e2a8fc/lanekemuguxitino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96446ff3-9b37-48ab-90bc-44d22e9ad4d6/biddeford_school_department_special_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec2065e2-16f2-435a-8486-69b04ed384d3/6402165923.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/386359cc-c4af-4a26-83ca-2bafbe7fe72c/alchemist_ffxiv_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69c19ccd-de3c-49db-bd9c-ef6d3d6fa518/lodiwesesoxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22f2209a-06fa-442d-9df4-63654418c1ae/steakhouse_chef_zubir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d13088e5-9fad-47b1-ac34-65b41e4a88e4/libros_profeticos_del_antiguo_testamento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab07cf25-f2aa-4830-8ab1-948c9103f80e/zeforu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE33 4992 bytes
SHA-256: 0965154ee7f9de873ca3d565c34fb1a4b21ead1c5f06c9b0ab25427b4355e13c
font_01_sfnt_off0000df3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3C 9880 bytes
SHA-256: bd459ec5444a3409d447bec4a6de03549497c4416e724d4b10545ea797b03fa5
font_02_sfnt_off00010103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10103 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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