Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c4aa553c4db2032…

MALICIOUS

PDF

95.1 KB Created: 2021-04-06 19:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fe038c0402ec9ae4cd48bca75980ef3e SHA-1: 6f24898846ca11eb9a8dd684c3e153cc0e352766 SHA-256: 8c4aa553c4db2032b8c9287cdf5d7e844302898a1876594398b4d872f18c98d2
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs pointing to potentially harmful content or phishing sites. The presence of embedded URLs and the overall structure suggest it's designed to lure users to external resources, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/award?keyword=bhagavad+gita+chapter+12+slokas+in+kannada+pdf PDF link annotation
    • https://cdn.sqhk.co/takularozo/iksjb8t/93224622001.pdfIn PDF document text
    • https://lixazasowab.weebly.com/uploads/1/3/4/5/134588429/9469190.pdfIn PDF document text
    • https://jubekufolofifi.weebly.com/uploads/1/3/4/5/134593927/5682256.pdfIn PDF document text
    • https://regezubigif.weebly.com/uploads/1/3/5/3/135320660/pamebasopulovas.pdfIn PDF document text
    • https://satepiwe.weebly.com/uploads/1/3/5/3/135350267/6354260.pdfIn PDF document text
    • https://dupukixulin.weebly.com/uploads/1/3/2/6/132681516/wobawi_tipizavur_gejukuwonak_begivuput.pdfIn PDF document text
    • https://nanewibogexuro.weebly.com/uploads/1/3/1/3/131382113/sewuwapadu_gogufoxut_mafawureb_keroradojanabub.pdfIn PDF document text
    • https://cdn.sqhk.co/kebubupoxiz/ngeior4/planet_survival_tv_tropes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_604885ddc55ee.pdfIn PDF document text
    • https://siresikewutawin.weebly.com/uploads/1/3/0/7/130739490/pefulowulefut.pdfIn PDF document text
    • https://vujojetusifej.weebly.com/uploads/1/3/1/3/131398487/28596cb8128.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393631/normal_60036bdbe081f.pdfIn PDF document text
    • https://topalezomezo.weebly.com/uploads/1/3/4/3/134305389/7909519.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0c6b2c5e-c852-454c-8c01-bea24f6181fd.filesusr.com/ugd/b97644_c9d1bae6d2fd408aaf2217270679e283.pdf?index=trueIn PDF document text
    • https://bc5ba30c-e427-49eb-abc4-9677f18f04c1.filesusr.com/ugd/bcd086_6d84bc0465774e1e8afbeef5acce11e5.pdf?index=trueIn PDF document text
    • https://19527f6f-7821-4b33-8e58-d909ab9a203f.filesusr.com/ugd/b18fc6_205bcd6f42084753a74a23e8d8b0b2e9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/abd6cbe2-c30d-4bc2-9aa3-9278ad274fff/pipilanofasupediraton.pdfIn PDF document text
    • https://a8a70d16-e3f0-4805-b115-4d8c62c40b57.filesusr.com/ugd/82e28d_4844c3924ae240cc8c219725f38593be.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f669d18c-3cbf-4c91-9754-c676750cc40e/biporedexupumelodoseno.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001086e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1086E 36420 bytes
SHA-256: 8dc59e39b096c169cc1c9f392664571973bd2c71a6a0d92948941662679541b5
font_00_sfnt_off0000eb42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB42 5776 bytes
SHA-256: 7fb1bdcd1caafad7a5eeee9e985f8d706ee2c1d300003ec564945ce84d6b7d5c
font_01_sfnt_off0000fefb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFB 2140 bytes
SHA-256: fd0baac36cf8fc893687cbe6b3b8165417b6c4fca046c9a5e64821bfdf5295b8
font_03_sfnt_off00014a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A3C 10404 bytes
SHA-256: b7ecc6cd0674eb80fd88e9af066e0eff4544d5c85967045e3d61a4f2b4c54768