Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0323a98d9bd728…

MALICIOUS

PDF

86.2 KB Created: 2021-03-17 14:29:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2a98246ec3abce468df8c7afc37d31b7 SHA-1: 24ba2e3df00a7025ee7ee42c4947f05abb9d4383 SHA-256: 0f0323a98d9bd728547cf987abed1053d88af133669a5e0a04fd45ab336b41f7
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://fokemale.ru/strik?utm_term=les+3+mousquetaires+dessin+anim%25C3%25A9+episode+25', is presented in a context suggesting a lure for an animated episode. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/strik?utm_term=les+3+mousquetaires+dessin+anim%25C3%25A9+episode+25 PDF link annotation
    • http://tebafurunaxinuj.getenjoyment.net/ielts_academic_writing_practice_test_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485568/normal_6016c1546f643.pdfIn PDF document text
    • https://cdn.sqhk.co/kabevapixox/gdohchg/zifanumulefuburala.pdfIn PDF document text
    • https://cdn.sqhk.co/kazaluxi/gdgjihl/foxivakijamajapewuvibema.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/hje2tji/drift_king_hot_wheels.pdfIn PDF document text
    • https://cdn.sqhk.co/sepokafaru/qhc5vDe/cut_you_off_in_spanish.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480594/normal_601ae98675158.pdfIn PDF document text
    • https://cdn.sqhk.co/tedigedubemi/fFjiibu/rojubumut.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/betefowubevat/tivod.pdfIn PDF document text
    • https://03386fec-e341-46be-bf9f-2f2bd19f9bfe.filesusr.com/ugd/bf57b5_012bd90db12849adbcf7146ac213b8a4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/salile.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/tinazaloxod.pdfIn PDF document text
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_2a51b23f47534b39a065139d14347b36.pdf?index=trueIn PDF document text
    • https://7c3dd69e-6649-485e-b385-36acc2971cd6.filesusr.com/ugd/cf9ff1_34d5dcac0a3b47fc99eb27953ca95b92.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/7776715606.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/35722064802.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/47984329296.pdfIn PDF document text
    • http://pimoxonevuwewax.atwebpages.com/46794541214.pdfIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_d28cb324738648e6bd4053765d7227c3.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF577 7480 bytes
SHA-256: 520f6e31e2b4097f63c1d778ee61e416716242c4c3891b1b2ba395e670608acd
font_01_sfnt_off00010ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED9 5700 bytes
SHA-256: 9c692961164158a7b19367237b006d2e35702308675c92e25de9ad1ab7c0844b
font_02_sfnt_off000121e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E5 11588 bytes
SHA-256: bc5a6cb7300f3e8ce32517e8577edacc69b467deb16e20fe1d4579d21f0f42e0

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