Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b292eed40986dd6…

MALICIOUS

PDF

71.4 KB Created: 2021-06-09 04:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7413020a477b9e503c5d0179991195ab SHA-1: b714de333df2c461eb48da4bfe5f8de73bf7ab6e SHA-256: 8b292eed40986dd6ab63d1f7119444ee5ac89cc6f4e616087d35f1bf867059ec
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://wastran.ru/pbw?utm_term=garena+free+fire+diamond+hack+apk PDF link annotation
    • https://moforikegumiret.weebly.com/uploads/1/3/2/6/132680993/jixet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368998/normal_5ff609e303856.pdfIn PDF document text
    • https://tebelusagunesaz.weebly.com/uploads/1/3/4/3/134318259/407322.pdfIn PDF document text
    • https://sepoxoritafide.weebly.com/uploads/1/3/1/4/131438330/14f0b.pdfIn PDF document text
    • https://nuvarimo.weebly.com/uploads/1/3/1/3/131378817/xipebizetaveso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450747/normal_5ffb2862e11f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421201/normal_60199f6663109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487622/normal_601ddeb42f9c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445106/normal_5fd2c07029114.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b9cb8b4-a93f-450c-9121-eef3bdb93481/tensor_calculus_kay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b9e0430-2d38-4bb4-8349-f3060b482532/91760154247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b74b2a6c-686d-4ab2-9dd2-3b89907fd0e5/61268601070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5adf3e7-8692-4483-a583-63a7e83d1ef9/80cc_motorized_bicycle_motor_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0c6da2a-0eeb-4088-a99a-c6026c790f3b/you_dont_know_js_yet_scope__closures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35ea2166-b180-48d7-a9cd-bc8608fb32ae/81341764060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f90b9566-58cc-4577-9d6a-7c6f0dafced3/a_fine_balance_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3e9456f-1eaf-4f00-9f24-fb92f5ba7a4e/naxeex_superhero_mod_apk_download_for_android.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_off0000d883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD883 5280 bytes
SHA-256: 77fd8a5018464dd85d26fef8fc7128b2fb9c7dc8a825beeca2fda4b8c0618b1a
font_01_sfnt_off0000ea58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA58 10848 bytes
SHA-256: 8b456e2e6a063c37e365fc3c5111be07e081b736731e21db1d8422fae0b9d87d

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