Malicious PDF — malware analysis report

Static analysis result for SHA-256 87a1c20d242a2ae4…

MALICIOUS

PDF

86.0 KB Created: 2021-03-13 18:07:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6c66d01e7d07a932ada9e27c72142667 SHA-1: a564f035f7a1f590a58e5b9690876aff271102af SHA-256: 87a1c20d242a2ae4540d1e526405375e14afea15cba94b2f96583f9639e68135
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, disguised as a manual for a Digitech Vocalist Live 3. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URL suggest a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/wix?keyword=digitech+vocalist+live+3+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4460042/normal_601c5d1862f74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457881/normal_6027d9b1cfbd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366956/normal_6029240fec4b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404520/normal_5fc59c24dc498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393345/normal_603491f980689.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472486/normal_6004fa02167a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470220/normal_604aea6251e69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459321/normal_602ec7992433c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449172/normal_60302a0768a3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gidepajujida.rf.gd/sevum.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/77729316129.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/kanto_spawn_guide_pokemon_revolution.pdfIn PDF document text
    • http://dupumimegijema.epizy.com/agent_vinod_movie_hd_quality.pdfIn PDF document text
    • http://sonowodiguvab.epizy.com/37171697423.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/us_constitution_amendments_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/chronological_vs_functional_resume_format.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/auditing_short_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/adoration_brenton_brown_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/zikigak.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/62728282853.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/xubikojabomajexitak.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_off00011079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11079 5340 bytes
SHA-256: c8dd54c220e407293e97eb6615d848984617754e320897aab8c0b37184ae0008
font_01_sfnt_off00012294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12294 11640 bytes
SHA-256: 2df2b34f9b919fe80719d0feb765e7066331e483f2c1edba4675a98d9a47a49d

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