Malicious PDF — malware analysis report

Static analysis result for SHA-256 d048ba15606bef10…

MALICIOUS

PDF

87.4 KB Created: 2021-04-20 09:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f213ceb819778c854136ae60bb7122dd SHA-1: fa037df670caf28a2b988b81181520f8bda7b5a9 SHA-256: d048ba15606bef1029cb913a4232dde1eeed9e7f940e866e0cc81c6c46d843c9
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An external URI pointing to 'maypoin.ru' was extracted, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and heuristics indicate it's designed to lead the user to a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/strik?utm_term=asmaul+husna+artinya+nama-nama+yang PDF link annotation
    • http://jogajep.medianewsonline.com/statistical_methods_for_speech_recognition_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467019/normal_600be7ce5cfdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482848/normal_60454f8d2b2a4.pdfIn PDF document text
    • http://wiwajekirutiw.scienceontheweb.net/que_es_acidosis_respiratoria.pdfIn PDF document text
    • http://wifisef.medianewsonline.com/15347955187.pdfIn PDF document text
    • https://cdn.sqhk.co/pomorezolo/iigfP2b/95174216327.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/Diehfyu/33139263048.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414868/normal_6059b07e5b22b.pdfIn PDF document text
    • http://ruxenawuxovogu.getenjoyment.net/9697310243.pdfIn PDF document text
    • http://kijofizovurisos.medianewsonline.com/fafuwap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412778/normal_5fd0636a18117.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/36083613221.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420764/normal_6000057a19149.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/begijufadi/29984630174.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/diribidusinudonabeluritew.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/vowoboleribinovutigo.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/8776060978.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/fevabes.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/90142914673.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/carcel_de_amor_carol_marinelli.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/31370832363.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/94020453569.pdfIn PDF document text
    • http://xonolori.atwebpages.com/tidizumixuvokubalififulo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000125d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x125D5 23072 bytes
SHA-256: 9884107b0aaabb841e1f37cdaa5d1f4559516ee185fcaa39d3e9852636306820
font_00_sfnt_off0000efac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAC 5220 bytes
SHA-256: 38cd648762dbe033d5cd472bbdaa0573fe5f1455d14e215d6864e68f171c1a08
font_01_sfnt_off0001014b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014B 10852 bytes
SHA-256: a89b1c71e57c5ed9886ddf4cf6240d50929dea0ab70632d45b644216fa4eeabd

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