Malicious PDF — malware analysis report

Static analysis result for SHA-256 687798fb43ec8e00…

MALICIOUS

PDF

66.9 KB Created: 2020-12-20 03:47:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 41d0b71081f05bd84cccce95466dc0eb SHA-1: 021ef941494a99edd8e8d29a9272e115f26b8d1b SHA-256: 687798fb43ec8e00173e70c40064ed60ddcd525c9b9322ba8b65484dcee1843a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffi.ru', which is a strong indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://trafffi.ru/strik?utm_term=ray+park+darth+maul+behind+the+scenes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5f9008e583092.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467573/normal_5fcc9e941dce5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5f9ed4337dc66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421473/normal_5f96f926d4458.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422386/normal_5fae919f31e1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_5f93d23f9ccbd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487905/normal_5fce3c00f0950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391317/normal_5f91d8fe5bf87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc0ce8ac6d964583621afbb/t/5fc2275f3c6ccf69f3a6b8c1/1606559584378/core_democratic_values_lesson_plans.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc697d2bd14ff0dd2c40102/t/5fd145254cd2f405fd60a79c/1607550247071/give_me_the_yellow_cab_company.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fde88431076b30d0a95c29a/t/5fde99847f4e6a33672598ea/1608423812411/18336121343.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc07d836b97992eb55a0df7/t/5fc1cfafcb3e0f577192c5ed/1606537135653/navy_courses_after_10th.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/siwepudimoseto.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64ab9abaecd331846e276/t/5fcaf1069cf56e0e8b0818ef/1607135498804/jiwurewibal.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA1B 5400 bytes
SHA-256: b85d64d649584eab89be432deec1b357804d681d888ca1af81005c776e8d36cc
font_01_sfnt_off0000cc46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC46 10636 bytes
SHA-256: 8fae2fefca9a43b1d8c131f1966a2dcc1f4e2c2b1f27994aa960bc771b92d5f9
font_02_sfnt_off0000f084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF084 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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