Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa880e0de59fa7c5…

MALICIOUS

PDF

77.2 KB Created: 2021-03-02 00:43:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: a5cfbe4fc22cac82dda6dcff2763d881 SHA-1: abe619f3d631843db3e72994ae859c9e9acfb281 SHA-256: aa880e0de59fa7c51a78675950428c56eddf6324e0dd3a3911990043737e25aa
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://midufefew.ru/wix?keyword=earth+taken+chapter+11', which is likely the primary lure. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/wix?keyword=earth+taken+chapter+11 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375352/normal_6039d6b4685db.pdfIn PDF document text
    • http://stnold.com/xejopuwxpdqm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505699/normal_602317b28e22d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382960/normal_6003a84b5f6ff.pdfIn PDF document text
    • http://hightrade.club/the_busy_treerv49d.pdfIn PDF document text
    • http://ctyr.ru/modelos_del_diagnostico_organizacional74tdi.pdfIn PDF document text
    • http://crysety.xyz/wedge_platform_shoes_australia6vhta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445888/normal_602b959153f98.pdfIn PDF document text
    • http://goldenframecollision.com/wall_street_journal_customer_service_call9w1qj.pdfIn PDF document text
    • http://nuvuxek.iblogger.org/dopofijesupasi.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/jeponowon/nelevuwap.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/careers_in_home_economics.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/finding_axis_of_symmetry_from_factored_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/sample_marketing_plan_template.pdfIn PDF document text
    • http://dikokek.epizy.com/mukofosabapum.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/entering_data_into_excel_worksheet.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_off0000f2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A4 4884 bytes
SHA-256: 35cf87f0a3fdc521f7cababf25892e18eb9e12a2cc10a270eb7397b36ce995df
font_01_sfnt_off00010340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10340 10724 bytes
SHA-256: f659d9259d3ad68568de102617036b4b381dbacb51e96ec071f9841e123500e1

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