Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f3f450b5cb4d2d6…

MALICIOUS

PDF

86.5 KB Created: 2021-03-26 08:59:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b20d4f9ed4284d3d91be0411520fa0bd SHA-1: 9d25c7b4ddcbd719dfb65c9857062e3660e9cdc9 SHA-256: 8f3f450b5cb4d2d68c3bf4a5cf4a32afde1be24c9e866944fcfd0897423d2bbd
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/strik?utm_term=preppers+guide+to+diy+food+preservation PDF link annotation
    • http://nefetenebubuwid.iblogger.org/72729456680.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380536/normal_5fde6542190f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384323/normal_605071fbefe61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388839/normal_5fdeff86bcffd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403824/normal_602ea13b0b4ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452199/normal_5fec6808a2b82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379852/normal_5ff7c38acea7b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384142/normal_600077a4cefc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390663/normal_6059a01b325be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480895/normal_60164c974613c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448744/normal_605905db6c294.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_6021c10404046.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388289/normal_5ff261299299a.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/dogazisuze/megejiziwenipori.pdfIn PDF document text
    • http://fokafupu.rf.gd/felegibezite.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/adding_rational_expressions_worksheet_with_answers.pdfIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_f308e9cadf654537b49d9a1212022500.pdf?index=trueIn PDF document text
    • http://bemunaxeje.epizy.com/67861055441.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/wiwutiruga.pdfIn PDF document text
    • http://vobewegogiz.rf.gd/arnold_chiari_malformation_fetal_ultrasound.pdfIn PDF document text
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_57bef84fe4fd4371865eb386131a9c0c.pdf?index=trueIn PDF document text
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_9b6a83410d8d49c1836691160123243d.pdf?index=trueIn PDF document text
    • http://renodiwug.epizy.com/log_graphing_paper.pdfIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_2bd6dca449494faea685d0872e17a649.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11425 5340 bytes
SHA-256: 929ffc697bdd871da5bc3cdb88053267ff63a38ac2382c9f3830e85256b197a4
font_01_sfnt_off00012670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12670 11268 bytes
SHA-256: 6b4d1e4ede7f7a8488c565cd26006950d27eaa69114df2e81b5e83687389de4e

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