Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a281c7937a54251…

MALICIOUS

PDF

79.6 KB Created: 2021-03-16 21:02:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 92e325b44c1dd30e0dff3767726f49a8 SHA-1: e39f0f0932cefe881b835029d21828ae96c6b616 SHA-256: 8a281c7937a54251bcfa4a675620f21063d4fd4defe5b408ad3052b01a65d387
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and the document body, though heavily obfuscated, appears to be a lure related to a book summary. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery via the embedded URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/strik?utm_term=los+5+lenguajes+del+amor+gary+chapman+resumen PDF link annotation
    • http://borejukeluteva.mygamesonline.org/security_guard_service_agreement.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407087/normal_5ff62e0a79222.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420018/normal_60077729ee6a0.pdfIn PDF document text
    • http://vovevowumusiki.iblogger.org/sobuxabupugo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391317/normal_6029a75883846.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384045/normal_601f8ec68f82e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496571/normal_6003732eaf14f.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/93530459440.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/44957766351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503692/normal_601d6345179ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374002/normal_6033a0f4b7c80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490539/normal_6049cc74a9a62.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/levumoduf/liriwewo.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/bodmin_airfield_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5381164f-3962-4805-bb29-2cc5a14a2ce3/how_to_record_sales_return_in_accounting.pdfIn PDF document text
    • http://kagiwabiluwotel.epizy.com/nupexapujigal.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/lexubutovi.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/what_are_barriers_to_effective_communication.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5163e51b-6e4b-498f-879c-9b0aa7ef6c05/amp_triplex_9200_rst.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/what_are_the_requirements_to_join_the_navy.pdfIn PDF document text
    • http://ripavumijew.rf.gd/63977618584.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/molugutezopowukazafikopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28a661cf-0b8b-4e20-9ee4-0948de8d9903/zamolomodeput.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d485a491-5333-4d95-ace7-1d90ad5954a0/zulogobunozuzu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CC 5728 bytes
SHA-256: ae5fe97a30724be5fb45e9545bd6d40426bc64292552e14d32fda168f97b2c0e
font_01_sfnt_off00010938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10938 11636 bytes
SHA-256: 45e871e35f0f1d8aa500096fbc868eb8a4b11dc091fa52277bde26b12563e22e

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