Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc117455e5b63f5…

MALICIOUS

PDF

79.2 KB Created: 2021-03-04 05:41:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0565948d2c2f1ce83388655a9efe1c23 SHA-1: 4408085a7f249dcf633b6fac60e594f2ae1315bd SHA-256: ecc117455e5b63f51cee6cadecb147298ef57a78a28415510f7e64a4199f4fbb
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 'gimoguvi.ru' was extracted, suggesting a redirection to a potentially malicious site. The document body, though heavily obfuscated, contains text related to printer issues, likely serving as a lure.

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://gimoguvi.ru/aws?utm_term=hp+officejet+j4680+paper+feed+problems PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458854/normal_5fdbe179e0700.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413004/normal_5fc979a24e112.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_6011229806efb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388048/normal_6026856ae5dcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375504/normal_6021c2bd19d6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451227/normal_6016b7c88d4b0.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/74871771811.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5fe80a91aec99.pdfIn PDF document text
    • http://nipawifaxupus.mygamesonline.org/makofu.pdfIn PDF document text
    • http://ritixibetono.mygamesonline.org/star_trek_enterprise_tpol_decontamination.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/jujadodedaruxix/fawowonixixogagiwixaga.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/bluetooth_controller_pc_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/85147130599.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/high_end_egyptian_cotton_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/2016_buick_regal_turbo_performance_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/larogu.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_off0000f69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69A 6056 bytes
SHA-256: 42036498b6df839b1e9197f0ae42428506e53fcdfa4e0fa3f1515ee94f38cff2
font_01_sfnt_off00010b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B24 10716 bytes
SHA-256: dc6fff2c7b083474e6ab1a50d19c81ceb09380d0385688cb17d2a75724fc73c2

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