Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6f99e5d66831251…

MALICIOUS

PDF

84.6 KB Created: 2021-03-09 18:21:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0c2ab01da1c7c164d1ac708e9c245c34 SHA-1: 7d6e71094a1b486b3ce553b764b8709c22541823 SHA-256: b6f99e5d66831251d8f1791f5bb650ab3d2e3f3001dea0d494951c9855bc1c77
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of an SEO link farm designed to redirect users to malicious sites. The primary redirector URL identified is 'https://soxebez.ru/wix?keyword=fossil+fuels+worksheet+6th+grade', which is flagged as a phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://soxebez.ru/wix?keyword=fossil+fuels+worksheet+6th+grade PDF link annotation
    • https://s3.amazonaws.com/pusixa/95804334608.pdfIn PDF document text
    • https://noromilo.weebly.com/uploads/1/3/4/5/134587763/5835682.pdfIn PDF document text
    • https://vexikolilugurud.weebly.com/uploads/1/3/1/3/131379290/c6a03b3b.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/epoch_microplate_spectrophotometer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/cancer_cachexia_guidelines.pdfIn PDF document text
    • https://tojisoma.weebly.com/uploads/1/3/5/3/135330836/radipidakesu_kizufo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479474/normal_5fe92197e9228.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/34186905988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380876/normal_600a1b61aae57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415950/normal_5ffac56dc6a82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5fd3d69e56ffd.pdfIn PDF document text
    • https://nolobatunu.weebly.com/uploads/1/3/0/7/130740420/morod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_5842ba6e333542d58d4b03ef8a426db4.pdf?index=trueIn PDF document text
    • https://8d90b851-447f-4cfc-ac95-1e867b71b983.filesusr.com/ugd/b371d9_1f4f4ae1c2e540b6953782b732b2c656.pdf?index=trueIn PDF document text
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_e196f23d1f764b669b6967777d930300.pdf?index=trueIn PDF document text
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_40a4878260b34733b3a13ac903946f0c.pdf?index=trueIn PDF document text
    • https://8a89c5bc-485b-4808-980c-66c60e8d9908.filesusr.com/ugd/834936_414f47ba1e2b47a5b73c7d2dd571a467.pdf?index=trueIn PDF document text
    • https://55f5e71c-5f54-469f-9449-301c43944234.filesusr.com/ugd/bbdb65_1956fbc2e595499b84d76b8fce579bcb.pdf?index=trueIn PDF document text
    • https://b54663a3-ff9d-4122-b75c-69b71428c9b0.filesusr.com/ugd/cfa91a_99ad1c51b5744d8fbb22e51550636132.pdf?index=trueIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_df55a4ca9a1d4fc3b328b36c6dc4a4ab.pdf?index=trueIn PDF document text
    • https://b6de9e3f-c562-4e05-b5ee-70895c8060ae.filesusr.com/ugd/3801ff_202c4d691c444c8693fe417555eef660.pdf?index=trueIn PDF document text
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_24ad9ab004ae4c2abecf37d0ce3f7b04.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E7 5432 bytes
SHA-256: c6d2249fd669d8b2e402ced9dfac5ab8f0e26721dc35ff6a0b89c4c16b10f7b1
font_01_sfnt_off00010b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B75 10468 bytes
SHA-256: beaf5259b33ec2ba248c9ee4f0f4173c091c16b3236e5933e18ff18a86e4ed41
font_02_sfnt_off00012f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8E 16068 bytes
SHA-256: 5338b60dac2ddcc9fbf81734882903060897ff8c18563aad6864a581beec55c6