Malicious PDF — malware analysis report

Static analysis result for SHA-256 2509ca7b944617af…

MALICIOUS

PDF

80.8 KB Created: 2021-05-25 07:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0ffc3a70b562a4312bc5230d12168d35 SHA-1: 2805a2b7a7040abb0f7460d1448d221b5958764e SHA-256: 2509ca7b944617af0e491424e3242d2c1fb5a6995933a39b990cb805279114f8
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by heuristics as a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jacksth.ru/strik?utm_term=manual+de+oratoria+alexander+alban+alencar+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4406775/normal_5fcbb14100328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470387/normal_604f8e07e7e91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412568/normal_5fe16f46eaf0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426063/normal_6047d1f896318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491665/normal_602b5dec01c6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_601a31a28c2eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490367/normal_5fe78bd244f67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496153/normal_60628084f0120.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476434/normal_5fcd4001f0f38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450641/normal_5fe14ac4c9539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373504/normal_6049ef2e8d4b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485156/normal_606d9f2d832f1.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/e0732a41-ed63-407a-bdc5-66f1d44a2040/how_to_get_a_distinction_in_english_speaking_exam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26c551e3-d4f5-407f-a178-d44fbedc2f24/linodejiwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1afd3b35-2f2f-44f5-b148-f1e1f20174a1/botem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06975c72-44bc-4277-927c-de9c1d65a5c3/wakigimigujoru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abd073c8-f4e6-4232-a2cc-9547ecca1f04/49767052228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/587f3013-7bf9-442a-8de8-05c18eec95ca/17499967692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0531062-ac5a-43ba-88b8-331f3413263b/56077269429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9436799a-69a8-4f9a-acb3-82581fd1551a/polaris_one_man_outrigger_canoe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d7e848b-6ff9-4d8f-bca5-d6a98681a85d/duvagewutuxipenitek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ace9d572-06d4-4ec6-b0b1-d1901b948bf4/58549989519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f8d9eb1-222d-401f-b28d-1e129cf59290/90000184293.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_off0000ec2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2D 5068 bytes
SHA-256: 87e8ca57fa9c27d3c4762be08de5fc585d949fe67381feff13a873b4b40dac1d
font_01_sfnt_off0000fd74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD74 12688 bytes
SHA-256: d5c280f5f34b6cd2841f4bd1121555f99ad26635bf5099b93046bd4e0b9e5fa8
font_02_sfnt_off000125b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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