Malicious PDF — malware analysis report

Static analysis result for SHA-256 92abfbd5c1e9bb38…

MALICIOUS

PDF

69.0 KB Created: 2021-01-23 11:30:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 409b37aeee499d4dd8e346b707d68fce SHA-1: 0754702d0604fae7cea256c8045bd44bf6d6e575 SHA-256: 92abfbd5c1e9bb38377951e137328c275775ee63ae7cb966328b263929a626d4
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is a strong indicator of malicious intent. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of an external URI suggests the document is intended to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/aws?utm_term=adaptec+asr-+71605+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461232/normal_5fd73a8254442.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453553/normal_5fcf7a6891ba0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387918/normal_5ffde92984be5.pdfIn PDF document text
    • https://site-1173136.mozfiles.com/files/1173136/invaluable_vs_not_valuable.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413016/normal_5fea3a0661c07.pdfIn PDF document text
    • https://site-1172173.mozfiles.com/files/1172173/crush_drop_hints.pdfIn PDF document text
    • https://site-1166670.mozfiles.com/files/1166670/79460943116.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469631/normal_60076842a02e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465264/normal_5fe3ff60735c2.pdfIn PDF document text
    • http://lulumel.66ghz.com/business_studies_notes_form_3.pdfIn PDF document text
    • https://site-1172681.mozfiles.com/files/1172681/fort_worth_stock_show_rodeo_tv_schedule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453103/normal_5fd97a903082f.pdfIn PDF document text
    • http://zirisumiwuxi.iblogger.org/definition_of_media_information_and_communication.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445558/normal_600012434806b.pdfIn PDF document text
    • https://site-1249333.mozfiles.com/files/1249333/rigipebozatixowuloxude.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/remuv/human_anatomy_atlas_free.pdfIn PDF document text
    • http://tidegofavinugaw.epizy.com/pokemon_battle_usum_game_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/black_desert_breeding_horses_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/kakezobajurumuj.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/wondershare_mobilego_8._5._0_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/7045945461.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/causes_of_parkinson_s_disease.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_off0000cd10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD10 5792 bytes
SHA-256: 2231d359f960227b110622305eabf461583a56e43cbdb8910e58c53eb3e7362d
font_01_sfnt_off0000e0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BF 11236 bytes
SHA-256: 930b3a4d1ae0abab6cda5e114d59f89637af7b48070de0cd1159213718b46f17

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