Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb8cb919220d09ba…

MALICIOUS

PDF

69.1 KB Created: 2021-04-04 17:12:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0282d2c87acd31eb616119445f54a15d SHA-1: 833b24b0323c35b78b276dcd5bfece8d7fd7bca9 SHA-256: bb8cb919220d09ba8485106e40c71c6100f0baeb1824b7b78440507fe5941282
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a "link farm" by heuristics, suggesting a malicious intent to redirect users to potentially harmful websites. The ML classifier and ClamAV detection strongly indicate malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a phishing or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://golowaki.ru/wix?keyword=medline+wound+care+pocket+guide
    • https://zuvimetuna.weebly.com/uploads/1/3/5/3/135304981/db1c480b.pdf
    • https://dobivevoxopu.weebly.com/uploads/1/3/1/4/131453544/gunotodumaver_zemuk.pdf
    • https://nokajaxupi.weebly.com/uploads/1/3/4/7/134715681/jegisivigubemip_nepemo.pdf
    • https://garotilalu.weebly.com/uploads/1/3/0/7/130739336/5533839.pdf
    • https://zafujanej.weebly.com/uploads/1/3/4/6/134602077/foganuko_pididagufajil_lalesipizevew_belovak.pdf
    • https://vimosetadasosus.weebly.com/uploads/1/3/2/7/132740377/sopewele.pdf
    • https://womizanoxagas.weebly.com/uploads/1/3/1/6/131607010/zemexex_nizekiv_naponepi_tivinoretar.pdf
    • https://xozavefo.weebly.com/uploads/1/3/4/0/134018900/fesejajitozu.pdf
    • https://vejevidumuruje.weebly.com/uploads/1/3/5/3/135302175/fibajin.pdf
    • https://bifetidenogu.weebly.com/uploads/1/3/1/3/131379340/4424267.pdf
    • https://balesiloruj.weebly.com/uploads/1/3/4/6/134671801/bejuko.pdf
    • https://lutapusudifo.weebly.com/uploads/1/3/1/0/131070527/zaziwa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_b2b3807b41ae402c856a59a50618d431.pdf?index=true
    • https://bad3f395-1638-4667-b349-d6f934eeab49.filesusr.com/ugd/ed2d23_99b557273bf247758805de101a18a4c5.pdf?index=true
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_399e9f53495e4c719e3c9ad5219b7327.pdf?index=true
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_7f541ad258f4453cad4222740296f6cc.pdf?index=true
    • https://21c505bb-01ca-4817-a549-4ed1ebba5040.filesusr.com/ugd/7d7105_3f4f983c264744389b4226ec00074ff1.pdf?index=true
    • https://22fea36a-5e19-4af1-b4aa-fe6e1efe0ee9.filesusr.com/ugd/b5a188_e7e921c57d614213b3c4f60ed5e4c6de.pdf?index=true
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_ede8800abebe44a09785c98fb98304cf.pdf?index=true
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_b467ea95b7d64318a82e3e7abdf77fba.pdf?index=true
    • https://beb587af-1766-4a1c-893d-8c04a9882fa7.filesusr.com/ugd/f3bec4_dc56a75f4d074435b110bdc813265474.pdf?index=true
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_cc95eebc7a204e3cbfa5f837464f1c77.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0bc.bin
9812b7a98e3148e53b1f49e4eeeff945cc80c4f43ba5aa5106e6778b7d75251a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BC 5224 bytes
font_01_sfnt_off0000e2b2.bin
2956136b58ce0e5b82d832d6be9a5902e3ed356ff24ec481d114326fe6255544		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B2 10788 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.