Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ffef25843ded32…

MALICIOUS

PDF

76.7 KB Created: 2021-04-07 09:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 006be249a8ffcc9c7c32b815f5c4b893 SHA-1: c3aa4072d99cdb0142b4e18210e60a737c0b5d2a SHA-256: a3ffef25843ded3241ffc3738f101aeba1163bf75dab0811bf1831c8e8689f28
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL leading to a malicious domain. The document body, though heavily obfuscated, appears to be a lure related to a book title, suggesting a phishing or social engineering attempt. The presence of an external URI and the ML classifier's high confidence score indicate malicious intent, likely to redirect the user to a compromised site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=wind+up+bird+chronicle+best+quotes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379049/normal_5fd8cc1f16c0d.pdfIn PDF document text
    • http://beduzevitugok.mypressonline.com/22174576554.pdfIn PDF document text
    • https://waratonis.weebly.com/uploads/1/3/4/2/134235653/12252a4b35ee.pdfIn PDF document text
    • http://lenusabipowezo.getenjoyment.net/gonexamu.pdfIn PDF document text
    • https://kexibisurek.weebly.com/uploads/1/3/4/3/134334279/6577354.pdfIn PDF document text
    • http://zagozogenef.sportsontheweb.net/wubifukoribevoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446275/normal_5fe4bf75b19b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382781/normal_60405b44021bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zujakogi.onlinewebshop.net/simple_perfect_tense_exercise.pdfIn PDF document text
    • http://kadoxosin.atwebpages.com/dibujo_arquitectonico_simbologia.pdfIn PDF document text
    • http://ladurabazidema.onlinewebshop.net/african_country_capital_currency.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/authoritarian_style_of_leadership.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/6433515175.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/economical_insurance_claims_reporting.pdfIn PDF document text
    • http://komadolosa.rf.gd/42684393551.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/zujosog.pdfIn PDF document text
    • http://guriseb.myartsonline.com/banking_financial_terms.pdfIn PDF document text
    • http://tajiroxajesolut.atwebpages.com/12548725079.pdfIn PDF document text
    • http://xigufogadenake.epizy.com/gas_mask_box_template_to_print.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_off0000f0e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E8 5228 bytes
SHA-256: 32127096cb7a09228b778dc2b0933d1b39a1bd2cbcd1c35be2f9c687b99c0c3d
font_01_sfnt_off000102b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B2 10188 bytes
SHA-256: b1d6657eb3964fb6d30a6e4228eafccee2fd09a50c515cd2e6a541db17a06d08

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