Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f6c2d5e3e98f188…

MALICIOUS

PDF

71.3 KB Created: 2021-01-29 05:13:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: fb918b9e2a21fc8968b5c16dee5cf728 SHA-1: 46f105da39f4f711c0bbb1334b3621832769dba7 SHA-256: 8f6c2d5e3e98f1886aa29ca3f6a380b15940529c82ea6b2e6c520673b1a2f762
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an external URI pointing to a suspicious domain, likely part of a phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick the user into downloading further malicious content, possibly via JavaScript exploits within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=accounts+receivable+balance+sheet+or+income+statement PDF link annotation
    • http://tejajugumoneton.66ghz.com/coursera_financial_aid_application.pdfIn PDF document text
    • http://requiremcgood.com/stockade_soccer_kingston_nyxc3wn.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/b9Zhjii/jexilukemukemoza.pdfIn PDF document text
    • http://gopubewigofopa.iblogger.org/27372847000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412778/normal_601345e09edd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486201/normal_5fd2f43e55304.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389358/normal_5fd1726a7f9ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475383/normal_60041ec0145d7.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/wupagivoz/business_analytics_books.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/44997972469.pdfIn PDF document text
    • http://nanesipub.rf.gd/cassida_c200_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/scratch_1._4_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/trend_imsva_admin_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/recuperar_backup_whatsapp_iphone_para_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/46355867365.pdfIn PDF document text
    • http://jijetebum.epizy.com/solidworks_and_share_all_files.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_off0000dd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD45 5228 bytes
SHA-256: 906e7280e942963065cc917a1aad4e79293c9ec6276ad55278d28ab1af9bfb11
font_01_sfnt_off0000eee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE8 9524 bytes
SHA-256: 617dc926b27dc68518720b280aeb45a45ec5e1ac778c381d26ce2b6b1757230e

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